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ipn [44]
3 years ago
8

What expression is equivalent to x2 - 49?

Mathematics
1 answer:
aleksley [76]3 years ago
7 0

Answer:

C.

Expla:

x²-49

x²-7²

= (x+7)(x-7)

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The sum of two numbers is with a ratio of 15:10. Find the larger number.
arsen [322]
Assume the sum is 100. The ratio of the two numbers is 15:10. This means that we can divide this indow 15+10, or 25 parts. Let us do that. Divide 100 into 25 parts and see how much is in each part. 100/25 is 4, meaning that there is 4 in each part. 15 parts will have 15*4, or 60. 10 parts will have 10*4, or 40. To confirm, add 40 and 60. It matches with what we started out with, 100. 


The two numbers, assuming the sum is 100, are 40 and 60. 60 is the greater value.
4 0
3 years ago
Write an algebraic expression to represent the pay (in dollars) for working "x" hours at a rate of eight dollars and seventy-fiv
Olenka [21]

Step-by-step explanation:

Hours worked = X

Money earned per hour = $8.75

Your answer would be A.

E.g.) Say that there is another part to this question.

  You work for 3 hours, how much money would you earn after three hours? Use your equation "8.75x"

We know that "x" is equal to the hours worked, so plug in 3 for x.

8.75x = 8.75 *x

8.75 * 3= 26.25

So, if  you worked 3 hours, your total pay would be $26.25 (Note: this is not part of your answer, just an example to show you how equations work)

Hope this helps :)

3 0
3 years ago
Read 2 more answers
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 108.7-cm and a standard dev
Luden [163]

Let x be the lengths of the steel rods and X ~ N (108.7, 0.6)

To get the probability of less than 109.1 cm, the solution is computed by:


z (109.1) = (X-mean)/standard dev

= 109.1 – 108/ 0.6

= 1.1/0.6

=1.83333, look this up in the z table.


P(x < 109.1) = P(z < 1.8333) = 0.97 or 97%

3 0
4 years ago
10a3 what is the vocabulary for 10
True [87]
Context clues and look it up! we are here for moral support
4 0
3 years ago
Please I’m in a hurry I need help
Naily [24]

Answer:

18pi

Step-by-step explanation:

3 0
3 years ago
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