All categories

3 years ago

15-2b=-9solving 2 step equations

Mathematics

1 answer:

Sever21 [200]3 years ago

5 0

15-2b=-9
-15 -15 (step one)
-2b=-24
/-2 /-2 (step two)
b=12

You might be interested in

the half-life of strontium-90 is approximately 29 years. how much of a 500 g sample of strontium-90 will remain after 58 years

Yuliya22 [10]

Answer: 125 g

<u>Step-by-step explanation:</u>

$A = P_o\cdot e^{kt}\\\\\text{First, use the given information to find k:}\\\\\bullet A=\dfrac{1}{2}P_o\\\\\bullet k = unknown\\\\\bullet t=29\text{ years}\\\\\dfrac{1}{2}P_o=P_o\cdot e^{k(29)}\\\\\\\dfrac{1}{2}=e^{k(29)}\qquad divided\ both\ sides\ by\ P_o\\\\\\ln\bigg(\dfrac{1}{2}\bigg)=ln\bigg(e^{k(29)}\bigg)\qquad applied\ ln\ to\ both\ sides\\\\\\ln\bigg(\dfrac{1}{2}\bigg)=29k\qquad simplified-ln\ and\ e\ cancel\ out\\\\\\\dfrac{ln\bigg(\dfrac{1}{2}\bigg)}{29}=k\qquad divided\ 29\ from\ both\ sides\\\\\\-0.0239=k$

$\text{Now, use the following in the equation to solve for A:}\\\\\bullet A=unknown\\\bullet P_o=500\\\bullet k=-0.0239\\\bullet t=58\text{ years}\\\\A=500\cdot e^{(-0.0239)(58)}\\\\.\quad=500\cdot e^{-1.386}\\\\.\quad=125$

8 0

4 years ago

Explain in your own words how to solve a one-step equation.

vovangra [49]

Answer:

Solve the problem by taking whats preformed on the variable, inverse it getting the variable by itself.

3 0

3 years ago

If there are 1000 grams in a kilogram in 454 grams in a pound how many pounds are there in a kilogram?

MaRussiya [10]

Answer:

2.2

Step-by-step explanation:

A kilogram is 2.2lbs so if you weigh yourself and it says you weigh 60k then you multiply 60 times 2.2 you get 132lbs.

6 0

4 years ago

I need help ASAP <br><br> What’s the answer plz!!

oksian1 [2.3K]

Answer:

-32

Step-by-step explanation:

(1-3)^5

(-2)^5

6 0

3 years ago

Read 2 more answers

Multiply. Write your answer as a fraction in simplest form

Likurg_2 [28]

Answer:

Either 12/5 or 2 2/5

Step-by-step explanation:

I times 16 and 9 together to make 144

and 3 and 20 together to make 60

144/60= 12/5 or 2 2/5

6 0

3 years ago