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vitfil [10]
3 years ago
5

Find the sum or difference. (6x + 5) + (-3x + 7)

Mathematics
1 answer:
emmainna [20.7K]3 years ago
5 0

Answer:

3x+12 is the sum

9x-2 is differences

Step-by-step explanation: Combine like terms

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john is twice as old as mary. the sum of their ages is 21. how old is mary? let j = john's age and m = mary's age. select the sy
Verdich [7]
Hello,

let's assume j the john's age, m the mary's age.

<span>"John is twice as old as mary"==>j=2*m
</span>
<span>"the sum of their ages is 21" ==>j+m=21

==>2*m+m=21
==>3m=21
==>m=7
and j=21-7=14

</span>
3 0
3 years ago
You have been asked to analyze the popcorn recipes of three different local theatres in order to figure out which theatre has th
svlad2 [7]

Answer:    The ratio value of oil to popcorn kernels for theatre C is 6 / 32 = 3 / 16.

Step-by-step explanation: Given that the manager of Theatre A says that they usually go through about 15 cups of popcorn kernels and about 5 cups of oil each weeknight.

Then, the ratio value of oil to popcorn kernels for theatre A is 5 / 15 = 1 / 5.

Given that the manager of Theatre B says that they order 18 cups of oil and 72 cups of popcorn kernels each week.

Then, the ratio value of oil to popcorn kernels for theatre B is 18 / 72 = 1 / 4.

Given that the manager of Theatre C says that their concessions use 6 cups of oil and 32 cups of popcorn kernels on a busy Saturday.

Then, the ratio value of oil to popcorn kernels for theatre C is 6 / 32 = 3 / 16.

3 0
2 years ago
This is my final test quiz for math I need help
nlexa [21]

Answer:

a (-4/3)

Step-by-step explanation:

I think it is a because in the chart where x is shown all the values are increasing by positive 4 and in the chart where y is displayed it is decreasing by -3.

4/-3 or -4/3

4 0
3 years ago
Read 2 more answers
A triangular prism, with bases consisting of equilateral triangles of side length s, has height h and a volume of 250. If the su
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Answer:

10

Step-by-step explanation:

6 0
2 years ago
A random sample of 41 cars in the drive-thru of a popular fast food restaurant revealed an average bill of $19.55 per car. The p
Rashid [163]

Answer:

19.55\pm2.145

Step-by-step explanation:

We use the equation \bar x\pm z^*\sigma/\sqrt n, where \bar x=19.55, \sigma=6.33, n=41, and z^*=2.17. We obtain z^* from the z-score of a 0.97 confidence level.

8 0
2 years ago
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