Mathematics Middle School

Evaluate 5jk − 2k2 when j = 7 and k = 3

Answers

Answer 1

Answer:

93

Step-by-step explanation:

5(7)(3) - 2(3)(2)

105 - 12 = 93

Answer 2

Answer:

The answer is 93 or 105 - 12

Step-by-step explanation:

the first step is to replace the variables in the expression and then to solve by multiplying and dividing first and subtracting and adding last

1. 5*7*3 - 2*3*2

2. 105 - 12 = 93

Related Questions

DUE IN 30 MINUTES HELP NEEDED ASAP!!!!

DUE IN 30 MINUTES HELP NEEDED ASAP!!!!

Answers

It would be R1 R2 R3 R4 R5 & R6
It’s R1 r2 r3 r4 r5 r6

Two cities had low temperatures for the day of 10 and 5 degrees below zero. Write the temperature closest to zero as an integer?


I will mark brainiest!

Pls show work and explanation!
Thank U

Answers

Answer:

28

Step-by-step explanation:

2 hours for $7 and 3 hours for $21 so $28

Answer:

The answer would be 5

Step-by-step explanation:

Why is because 5 is closer too 0 then 10 is closer to 0

A linear function contains the following points.

What are the slope and y-intercept of this function?

A linear function contains the following points.What are the slope and y-intercept of this function?
A linear function contains the following points.What are the slope and y-intercept of this function?

Answers

Answer:

C!!! Only fraction and is negative!! hope this helps

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

im saying this might be right

You have $3.25 to buy bananas. Each bananas costs $0.35. How many bananas will you buy? Will you use all your money? If not, how much will you have left over?

Answers

Answer:

If had left over I would leave $1.85

Step-by-step explanation:

A little help here? And can anyone explain this?

A little help here? And can anyone explain this?

Answers

Answer:


D.

Step-by-step explanation:


According to the dot plot,


3 students spend 0.5 minutes brushing their teeth.


2 students spend 1.5 minutes brushing their teeth.


1 student spends 2.5 minutes brushing their teeth.


2 students spend 3.5 minutes brushing their teeth.


1 students spend 4 minutes brushing their teeth.



So, the number set will be: {0.5, 0.5, 0.5, 1.5, 1.5, 2.5, 3.5, 3.5, 4}


Median: The middle number in a set that is ordered from least to greatest.


In this example, the median is 1.5


Mean: The sum of all values divided by the number of values.

In this set there are 9 values so we’ll divide the sum by 9

In this example, the mean would be:

(0.5 + 0.5 + 0.5 + 1.5 + 1.5 + 2.5 + 3.5 + 3.5 + 4) ÷ 9

18 ÷ 9 = 2


If we compare the mean to the median we can see that the mean is greater because 2 > 1.5


The right answer is D

So far this year, Adam has played 30 games of chess and has only won 6 of them. What is the minimum number of additional games he must play, given that he is sure to lose at least one-third of them, so that for the year he will have won more games than he lost?
A) 24
B) 57
C) 87
D) It is not possible for Adam to do this.

The correct answer is B) 57, but not sure how?

Answers

Answer:

Step-by-step explanation:Yikes. Just so we’re all clear—this is not a real SAT question.

So far, Adam’s record is 6 wins/30 games. If he plays x more games, his record will be:

image

You find the minimum x such that the fraction is greater than ½, which would mean he won more than ½ of his games.

Let’s do some math!

image

So if he plays 54 more games, and wins 2/3 of them, he’ll have the same number of wins as losses. Check on that to make sure: He’ll have played 30 + 54 = 84 games, and won 6 + (2/3)54 = 42 of them. Yep, that works.

Now here is where it gets tricky (and why this question is not SAT-caliber). Remember that he’s losing 1/3 of his games. If his 52nd, 53rd, and 54th additional games were win, win, loss, then he would have had, very briefly, a winning record after his 53rd additional game.

His 55th additional game is another chance at a winning record. If he loses that game, then he’ll win the next two, and have a winning record for sure by the 57th additional game. From there, if he continues winning 2/3 of his games, he’ll have a winning record forever.

Try adding 57 to the equation, then you can see how 57 adds into the equation and proves the answer.

A survey found that 12 out of every 15 people prefer eating out over cooking. If 500 people took the survey, how many people prefer eating out?

Answers

Answer:

400 people

Step-by-step explanation:

15 = 12

500 = x

Cross multiply

15x = 12 × 500

Divide both sides by 15

\(\frac{15x}{15}\) = \(\frac{12 * 500}{15}\)  (* means multiplication if you do not know)

\(\frac{12 * 500}{15}\) = 100 × 4= 400 people

Divide 500 by 15 that equals 33.33 then multiply that number by 12 and that equals 399.96 which is then rounded up to 400/500 people prefer eating out rather than cooking at home.

Pls pls help me I will give 10 points

Pls pls help me I will give 10 points

Answers

Answer: d

Step-by-step explanation: y= +3x -6

(1/6) to the 2nd power

Answers

Answer:

0.0277777778

Step-by-step explanation:

\(\frac{1}{6} ^{2}\)

\(\frac{1}{6}\)  × \(\frac{1}{6}\) = 0.0277777778

The answer is 0.02777777777

The sevens just keep going

Just put a line right beside the last 7 so show it's infinte

What mixed number is equivalent to 12/10

Answers

Answer:

1\(\frac{2}{10}\)

Step-by-step explanation:

please help w/ this question!

please help w/ this question!

Answers

128*1= 128, 128/4= 32 *x=32*

Answer: I don't speak spanish but to simplify that equation, the answer is 32.

Step-by-step explanation:

First cross multiply (4x) and (128), then divide 4x and 128 by 4 and you will get x = 32. Hope this helps.

For each ride, a taxi service charges an initial fee plus an additional fee based on the number of kilometers of the trip. The graph shows the cost for taxi rides. Select a true statement. The rise is 4 while the run is 2. The selection of answers are:
A: The slope is 2.1. This means that each kilometer costs $2.10.
B: The slope is 5. This means that each kilometer costs $5.
C: The y-intercept is 2.1. This means that the initial fee is $2.10.
D: The y-intercept is 5. This means that the ride lasts 5. kilometers.

Which one is right and why?

Answers

THIS MIGHT NOT BE WHAT YOU ARE LOOKING FOR AND MIGHT NOT BE CORRECT! READ FIRST!

The answer is A. The slope of the line is rise/run = 4/2 = 2.1. This means that each kilometer costs $2.10. The y-intercept is 2.1, which means that the initial fee is $2.10. So the correct statement is: The slope is 2.1. This means that each kilometer costs $2.10.

The other statements are incorrect. The slope is not 5, so each kilometer does not cost $5. The y-intercept is not 5, so the ride does not last 5 kilometers. The y-intercept is the value of the function when the input is 0, which in this case is the initial fee of $2.10.

The answer for this is a

Margo is wrapping a box that is 7 inches long, 10 inches wide, and 4 inches high. How much wrapping paper will she need to cover the entire box?

Answers

She will need to cover a total of 268 square inches of wrapping paper.

She will need to cover six sides of the box. To calculate the surface area of the box, you'll need to add the area of each side. The formula for surface area is: 2lw + 2lh + 2wh. Plugging in the dimensions of the box, we get:

2(7 x 10) + 2(7 x 4) + 2(10 x 4) = 140 + 56 + 80 = 276

So, she will need 276 square inches of wrapping paper. But since she doesn't need to wrap the bottom of the box, we subtract one of the sides, which gives us a total of 268 square inches of wrapping paper.

To calculate the surface area of the box, you need to add the area of all six sides. The area of each side can be found by multiplying the length by the width.

- The area of the front and back sides is 7 x 4 = 28 square inches each.
- The area of the top and bottom sides is 10 x 4 = 40 square inches each.
- The area of the two side sides is 7 x 10 = 70 square inches each.

So, the total surface area of the box is 2(28) + 2(40) + 2(70) = 56 + 80 + 140 = 276 square inches.

Therefore, Margo will need at least 276 square inches of wrapping paper to cover the entire box.

Answer:280 in

Step-by-step explanation: First we multiply the length by the width and that would be 7 by 10 and we would get 70. Next we multiply the height by the total of (l x w), so 4 x 70 would be 280. Margo needs a total of 280 inches of wrapping paper to cover the entire box. Hope this helps! :)

An investor has an account with stock from two different companies. Last year, his stock in Company A was worth $6100 and his stock in Company B was worth $6480. The stock in Company A has decreased 2% since last year and the stock in Company B has decreased 10%. What was the total percentage decrease in the investor's stock account? Round your answer to the nearest tenth (if necessary).

Answers

Investment in Company A by investor = $6100

Investment in Company B by investor = $6480

The decrease in value of the stock of company A is 2%

The decrease in value of the stock of company B is 10%

Value of wealth that investor lost in company A = 6100× 2/100

= 61×2

= $122

The decline in the value of the stock of company B = 6480×10/100

= 648×1/1

= $648

The total decline in the wealth of the investor= 122+648

= $770

The combined wealth of investor in both companies= 6100+6480

= $12580

Percentage of decline in the stock account of investor= 770×100/12580

= 77000/12580

= 6.1%

The total percentage decline in investor's stock account is 6.1%

For more information about stock:

brainly.com/question/28392293

Here's what the problem looks like.

Here's what the problem looks like.

Answers

Answer: It is the first one.

Step-by-step explanation: Give brainliest

10 points help me pls

10 points help me pls

Answers

77288283838828383838
I know one of these is 27 hope that help a little bit sorry

PLEASE HELP ASAP WILL MARK BRAINLIEST
Katey has a bag of 4 marbles. There are 2 pink marbles, 1 orange marble, and 1 red marble.

PLEASE HELP ASAP WILL MARK BRAINLIESTKatey has a bag of 4 marbles. There are 2 pink marbles, 1 orange

Answers

Answer:

list 4

Step-by-step explanation:

List 3 is your answer !

From a 2.6L container of soft drink , Jiselee gave 5 glasses each holding 160ml to her cousins. She poured the remainder in glasses each holding 225ml and each glass for $10.50. Calculate the amount of money she earned

Answers

She gave 5 glasses of 160ml each thats equal to 800ml
The amount left is 2600ml-800=1800ml
The number of glasses she filled with 225 is 1800 divided by 225=8 glasses
She sold each glass for $10.50,so, she made 10.50x8=$84
Thus final answer is $84

1.Justin was tracking the growth of his new plant. His plant grew 2 inches every week.His plant was 10 inches when he got it, and 12 inches in the second week. Haw many inches tall was his plant in the sixth week?

2.If Justin's partern of growth continues, how tall will his plant be in the ninth weeks.

Answers

Answer:

1.20 inches

2.26

Step-by-step explanation:

6-2=4

so 4 weeks

4x2=8

8 more so 8+12=20

20 +((9-6)x2)=20+(3x2)=26

Answer:

1. 20 in
2. 26 in

Step-by-step explanation:

6-1=5

5*2=10

10in+10in=20in

(9-1)*2=16

16+10=26

About how much money would 18 pounds of cheese cost if the price is $3.95 per pound? Use two different ways to estimate the product. Are your estimates overestimate or underestimate? Explain.

Answers

1. this way is overestimating

assume that you are getting 20 pounds of cheese. that is 2 tens. so multiply 3.95 by 10 = 39.5 thats the price for 10 pounds of cheese. Since we're estimating to get 20 pounds, multiply by two or add 39.5 together twice. 79 dollars this is overestimating since you're raising the amount of cheese you're buying by 2 pounds

2. his way is overestimating

assume its 4 dollars per pound. 18*4 would be 10*4 + 8*4= 40+32 = 72 dollar

this is overestimating because you're raising the price of the cheese by 5 cents.

Answer: 71.1

Step-by-step explanation: Its really simple actully so what you do is you take 3.95 and you mulitply is by 18 or you can add 3.95 plus 3.95 18 times and you get drum roll please 71.1$. I hope my answer was help ful

This is big ideas work pls show how u do it so i know

This is big ideas work pls show how u do it so i know

Answers

Answer: [5 , -1] step-by-step-explanation

A 12-sided number cube with the numbers 1 through 12 is rolled. Rounded to the nearest hundredth, the probability that the number cube lands on a number other than 4 is what percentage?

Answers

Answer: 91.6666666667 pero lo redondeadas y te da de resultado 92.0% de probabilidades que no caiga un 4

Step-by-step explanation:divide 100 entre 12 y el resultado lo multiplicas por 11. no es como se saca la respuesta normalmente pero es una opción

The possibilities other than 4 are 1, 2, 3, and 5-12, so 11 other possibilities out of 12

11/12 = 0.91666667 = 91.67%

PLEASE HELP I FORGOT HOW TO DO COMPLEX EQUATIONS LIKE THIS!! PLS EXPLAIN IT!! also could you provide an easy review over how to solve systems of equations and using graphs too (like a graph that shows intersecting lines how do I know what systems match it?) plss help I have the algebra eoc in 2 days

PLEASE HELP I FORGOT HOW TO DO COMPLEX EQUATIONS LIKE THIS!! PLS EXPLAIN IT!! also could you provide

Answers

20q¹⁷w⁹ this is the answer hope this helps

PLEASE HELP I FORGOT HOW TO DO COMPLEX EQUATIONS LIKE THIS!! PLS EXPLAIN IT!! also could you provide

in which order should the four different digits be arranged to obtain the largest 4-digit number?

Answers

9999 is the answer I think.

05.06 LC)

The net of a solid figure is shown below:

Which calculation will give the total surface area of the solid figure?

5 × 6 × 6 square inches
6 × 5 × 5 square inches
6 × 5 × 5 × 5 square inches
5 × 6 × 6 × 6 square inches

05.06 LC)The net of a solid figure is shown below:Which calculation will give the total surface area

Answers

Answer:

B second option

Step-by-step explanation:

shape is cube, surface area is area of all six sides, to find one side, 5x5, for six sides x6, 5x5x6

Answer:

the correct calculation of the surface area is  6 x 5 x 5 x 5 square inches  

hopefully its correct :)))))))

Step-by-step explanation:

8÷–4×(–7––2)=?
OM god guys I need help on this one! This is urgent!! pls hurry up!!

Answers

Answer:

10

Step-by-step explanation:

\((8 \div -4) \times ( - 7 + 2) = (-2)( - 5) = 10\)

Determine which is the better buy.
9 straps for ​$10.25 or 30 straps for ​$66.00

Answers

Answer:

9 straps for $10.25

Step-by-step explanation:

Price rate

9 straps for $10.25 = 10.25/9 = $1.14 per strap30 straps for $66 = 66/30 = $2.20 per strap

Better buy

9 straps for $10.25Less cost per strapbetter buy

Answer:

9 straps

Step-by-step explanation:

If you're selling 30 straps for $66 then you get a 2.2 per each

But 9 straps for $10.25 will get 1.139

So, the value that's smaller which is 9 straps for $1.139 is a better buy

Please help! Thank you!

Please help! Thank you!

Answers

Answer:

525

Step-by-step explanation:

If it's just asking to find the average of heads then times it by 20 then just do 32+28+21+24 to get 105 and divide it by 4 to get 26.25 then times it by 20 since this is the average of 50 throws and it's asking for the average of 1,000 throws which is 525

525 I ain’t adding nothing because your mom ate this d last night

help 3x6778=y +56789

Answers

Answer:

Step-by-step explanation:

y

=

3

x

6778

−

56789

I believe that answer is y=36455

Complete the statement using <, >, or =
_ __
3√3 _?_ √27

Answers

Answer:

=

Step-by-step explanation:

/3 is 1.732x3= 5.196 =/27 27squared is 5.196

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