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Pepsi [2]
2 years ago
9

Help with 4 questions please

Mathematics
2 answers:
mr_godi [17]2 years ago
3 0

Answer:

Step-by-step explanation:

-1+x/3= -7

-3+x=-21. Multiply both sides by 3

X=-21 + 3

X= -18

12345 [234]2 years ago
3 0
17) x=-18
19) x=7
21) x=7
23) n=8
The answer are definitely correct. I'm not gonna trick you.

Hope I can help you!
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at davidson's bike rentals it cost $42 to rent a bike for 9 hours. how many hours of bike use does a customer get per dollar?
Alona [7]

Answer:

3/14 of an hour

Step-by-step explanation:

9 hours/42 dollars

5 0
2 years ago
How do you do multi step equations step by step
Ilya [14]

Answer:

1) First, add or subtract both sides of the linear equation by the same number. 2) Secondly, multiply or divide both sides of the linear equation by the same number. 3)* Instead of step #2, always multiply both sides of the equation by the reciprocal of the coefficient of the variable.

Step-by-step explanation:

5 0
3 years ago
15a^2 + 14a -8 use A.C method
bekas [8.4K]
Hello there!

A C method : you multiply the A and C -> find the factors of AC that can add                          up to B. (a² + bx + c)

15a² + 14a - 8

you multiply 15 and -8 = -120
Find the two factors of -120 that adds up to 14.
We could used 20 and -6.
So we can split the original equation to this:

15a² + 20a - 6a - 8
Now, we use grouping method.
Let's group 15a² + 20a  and -6a - 8.

15a² + 20a can be factored like this :
5a(3a + 4)

-6a - 8 can be factored like this :
-2(3a + 4)

So it is 5a(3a + 4) × -2(3a + 4)
We can simplify this into this :
(5a - 2)(3a + 4)


So your final answer is (5a - 2)(3a + 4).
Hope this helped! :)
8 0
3 years ago
1. Jack and Jill both begin working new jobs for the summer. Jack is offered $18 per hour and will also be given $699 up front f
Nadya [2.5K]

Answer:

BRuh

Step-by-step explanation:

Girl my math skills are no where near subpar to that. Good luck!

3 0
3 years ago
Read 2 more answers
Compare the investment below to an investment of the same principal at the same rate compounded annually.
Andrews [41]

~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$5000\\ r=rate\to 8\%\to \frac{8}{100}\dotfill &0.08\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{semiannually, thus twice} \end{array}\dotfill &2\\ t=years\dotfill &19 \end{cases} \\\\\\ A=5000\left(1+\frac{0.08}{2}\right)^{2\cdot 19}\implies A\approx 22194.067 \\\\[-0.35em] ~\dotfill

~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$5000\\ r=rate\to 8\%\to \frac{8}{100}\dotfill &0.08\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{annually, thus once} \end{array}\dotfill &1\\ t=years\dotfill &19 \end{cases} \\\\\\ A=5000\left(1+\frac{0.08}{1}\right)^{1\cdot 19}\implies A\approx 21578.505

6 0
2 years ago
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