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Evgen [1.6K]
3 years ago
10

7. Define a variable and write an expression for the phrase. 8 minus a number

Mathematics
2 answers:
lakkis [162]3 years ago
7 0
8-x ccccccccccccccccccccc
xxTIMURxx [149]3 years ago
5 0
A variable is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent a variable. The letters x, y, and z are common generic symbols used for variables.


So basically for your expression:

8-x
Hope that helped
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Which law would you use to simplify the expression (4x)^9?
Dafna1 [17]

Answer:

Power of a product.

Step-by-step explanation:

Hope this helps!

=)

4 0
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A 25 ft. ladder resting against the side of a building forms a right triangle with the ground. The bottom of the ladder is 7 ft.
ruslelena [56]

Answer:

The correct answer is 24

Step-by-step explanation:

to solve this you will need to use the pathagreom theorum

a^{2}+b^{2}=c^{2}

A= one side lenth

B= the secons side lenth

C= hypotnuse

It is helpfull to draw out the situation

you know that the latter is 25 ft, that is your hypotnuse

you also know that the 7 ft away from the base of the building is one of the side lenths, lets call it side a

so plug the numbers into the equation

7^2 + b^2 = 25 ^2

you leave b^2 alone because that is the side you are trying to find

now square 7 and 25 but leave b^2 alone

49 + b^2 = 625

now subtract 49 from both sides

b^2 = 576

now to get rid of the square of b you have to do the opposite and square root both sides removing the square of the B and giving you the answer of..........

B= 24

Hope this helped!! I tryed to explain it as simpil as possiable

6 0
2 years ago
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What is the value of 3-(-2)​
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Answer:

5

that is the answer

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