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77julia77 [94]
3 years ago
12

How do you represent an unknown quantity?

Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
5 0

Answer: With a variable. A variable is a letter you use in an equation , like this: 7+x=14, X is a classic one but you can use any letter u please! (In my school at least.)

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HELP PLEASEE.. THIS IS FOR MATHH.<br><br> WHICH INEQUALITY MATCHES THE GRAPH?
V125BC [204]

your answer is B because its a closed circle

5 0
3 years ago
What does why y equal
Novay_Z [31]

Answer:

y=2/3x+4/3

Step-by-step explanation:

4 0
3 years ago
Expand $(x+1)(x^{2}+1)(x-1)$. What is the sum of the coefficients of the resulting expression?
defon

Answer:

0

Step-by-step explanation:

Hello, please consider the following.

For any a and b real numbers we can write.

(a-b)(a+b)=a^2-b^2

We apply this formula two times here, as below.

(x+1)(x^{2}+1)(x-1)=(x+1)(x-1)(x^{2}+1)\\\\=(x^2-1^2)(x^2+1)=(x^2-1)(x^2+1)\\\\=(x^2)^2-1^2=x^4-1

We have the coefficient of 1 for x^4 and the constant term is -1, so the sum of the coefficients is 0.

Thank you.

8 0
3 years ago
Read 2 more answers
The sum of two numbers is 27. One number is seven less than the other. Find the numbers
Marat540 [252]

Answer:

17 and 10

Step-by-step explanation:

Write the problem as an equation.

a+b=27

a=b-7

Where a and b are the two numbers you are trying to find. You could use any variables. Then solve.

b+(b-7)=27      Sub (b-7) for a

2b-7=27          Group like terms

2b=34             Add 7 to both sides

b=17                 Divide both sides by 2.

Because b=17, a must be 10.

6 0
4 years ago
Can someone check me answers to see if I’m right
dybincka [34]

Answer:

Question one: 3rd option

(Pt. 2 written):

b=ac^2

b=1/8 (4)^2

b= 2

Question two: It is option 2

(Pt. 2 written):

v= m-k

v= -2+7

v= 5

Question three: option 2

(Pt. 2 written):

q=ps/r

q=14(-4)/-7

q=-56/-7

q=8

Question four: It is choice number 3

(Pt. 2 written):

m=3n/4

m=3(8)/4

m=24/4

m=6

Question five: It is choice number 2

(Pt. 2 written):

x=wy+z

x=-8(-5)+6

x=40+6

x=46

8 0
4 years ago
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