2 years ago

If you multiply four times the sum of my number and 2, you get 28. What's my number?

Mathematics

1 answer:

Karo-lina-s [1.5K]2 years ago

4 0

Answer:

Step-by-step explanation:

5+2 = 7

7x4 = 28

You might be interested in

What is 83/100 simplified?? PLEASE answer quick?

denpristay [2]

Answer:

Step-by-step explanation:

83/100 is already simplified. You can not make it smaller.

7 0

2 years ago

8. f(x) = 2x + 2<br> what’s the solve for x ?

Aleksandr-060686 [28]

Answer:

X=-1

Step-by-step explanation:

0=2x+2

subtract 2 out

-2 = 2x

divide 2 on both sides x = -1

5 0

2 years ago

3X-1=4 THEN 2X= ...?

strojnjashka [21]

3x=4+13x=5x=5/32x=2* 5/32x=10/3

8 0

2 years ago

Which ordered pair in the form (a, b) is a solution of this equation?

Evgen [1.6K]

3a - 4b = 21

check (-2 , -3)

3(-2) -4(-3) =21

-6 +12 = 21

6 does not = 21 so NO

check (0 , 7)

3(0) -4(7) =21

0-28=21

-28 does not equal 21 so NO

check (-3 , -2)

3(-3) -4(-2) =21

-9 +8 = 21

1 does not = 21 so NO

check (7 , 0)

3(7) -4(0) =21

21 = 21

Choice D

5 0

3 years ago

Expand and combine like terms.<br> (3c^4-5c^6)^2

lora16 [44]

Answer:

$9c^{8} -30c^{10} + 25c^{12}$

Step-by-step explanation:

We can use formula (a-b)² = a² -2ab + b².

In our example a = 3c^4 and b = 5c^6

$(3c^{4} - 5c^{6})^{2} = [3c^{4} ]^{2} - 2*3c^{4} *5c^{6} + [5c^{6}]^{2}=\\=9c^{8} -30c^{10} + 25c^{12}$

4 0

2 years ago