All categories

3 years ago

After you add both sides by 9. How can you solve for 5z in this equation 5z-3=12

Mathematics

1 answer:

lutik1710 [3]3 years ago

3 0

Answer:

OPTION A: Divide both the sides by 5

Step-by-step explanation:

We are given: 5z - 3 = 12

When we add 9 to both sides we get:

5z - 3 + 9 = 12 + 9

⇒ 5z + 6 = 21

⇒ 5z = 21 - 6 = 15

⇒ 5z = 15

To find the value of z we have to divide both the sides by 5.

i.e., $\frac{5z}{5} = \frac{15}{5}$

⇒ z = 3.

You might be interested in

About 250 million drivers are registered in the United States. While on a trip with her family, a student counted the number of

Lilit [14]

She could estimate that there would be about 148 million female drivers.

From her data, she found there were 118 females drivers out of the total 200 drivers that she counted.

That is 118 out of 200 or 0.59 or 59%.

Now, just take 59% of 250.

0.59 x 250 = 147.5 which rounds to 148.

4 0

3 years ago

Simplify expression.<br> help me please

tatuchka [14]

Answer:

$\frac{-1}{x+3}$

Step-by-step explanation:

Hope this helps!

6 0

2 years ago

Can anyone please please help me with this

svlad2 [7]

Answer:

it should be 14.25

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Factor this equation<br> 4x^2+12x-7

Levart [38]

$4x^2+12x-7=0\\\\a=4;\ b=12;\ c=-7\\\Delta=b^2-4ac\\\\\Delta=12^2-4\cdot4\cdot(-7)=144+112=256 \ \textgreater \ 0\\\\therefore\\x_1=\dfrac{-b-\sqrt\Delta}{2a}\ and\ x_2=\dfrac{-b+\sqrt\Delta}{2a}\\\\\sqrt\Delta=\sqrt{256}=16\\\\x_1=\dfrac{-12-16}{2\cdot4}=\dfrac{-28}{8}=\boxed{-\dfrac{7}{2}}\\\\x_2=\dfrac{-12+16}{2\cdot4}=\dfrac{4}{8}=\boxed{\dfrac{1}{2}}$

3 0

3 years ago

Describe how you would estimate the first number of the quotion for the division497÷22

liraira [26]

I would round them so it would be 500 divided by 20
The answer should be close to 25

4 0

3 years ago