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PIT_PIT [208]
3 years ago
6

I have two equationsa-2b=8 and 4a+3b=21 how can you solve one of these for a​

Mathematics
1 answer:
Olenka [21]3 years ago
6 0

Step-by-step explanation:

You could find a number that can be multiplied by 2 and a number for a that when you subtract from the number that you multiplied by 2 can give the result of 8.

Example:

a-2b=8: a=12-2•2=8

12-4=8

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Which of the following is the inverse of N(r) if N(r)=8r+17
BaLLatris [955]
N=8r+17 \\ 8r=N-17 \\ r= \frac{N-17}{8}  \\  Inverse \ is \ \frac{r-17}{8}
8 0
3 years ago
HELP! Please! A car is traveling at a rate of 15 meters per second. What is the car's rate in kilometers per hour? How many kilo
gizmo_the_mogwai [7]

Answer:

0.06km

Step-by-step explanation:

15÷1000=0.0015

0.0015×4=0.06

7 0
3 years ago
What is the lateral surface area of the pyramid?
Delicious77 [7]

Answer:

1,536 square centimeters

Step-by-step explanation:

The formula for the Lateral surface area of the pyramid =

1/2 × perimeter of the square base × slant height

Square base = 32cm

Slant height = 24cm

Perimeter of the square base = (4 × length of the square base side)

4 × 32cm = 128cm

Lateral Surface Area = 1/2 × 128cm × 24cm

= 1,536 square centimeters

6 0
3 years ago
What is the value of   ?
azamat
Sure! So this is ready as "the cube root of 125". This basically means, "what number cubed can get me 125?"
Let's go through our options.
We can rule out D, as D cubed would be unreasonably big.
We can also rule out C, because 375 cubed is easily over 10000, you know this even if you haven't computed it all, just compute the 300 cubed.
We can rule out B, too. 41 squared is already over 125, therefore it can't be the answer.
Therefore our answer is A, 5. We can check that by cubing 5, and that indeed gets us 125.
Hope this helps!
4 0
3 years ago
Read 2 more answers
What is 122 / 600?<br><img src="https://tex.z-dn.net/?f=122%20%5Cdiv%20600" id="TexFormula1" title="122 \div 600" alt="122 \div
kipiarov [429]
The answer : 0.20333333333
5 0
2 years ago
Read 2 more answers
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