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Harrizon [31]
3 years ago
7

A bookstore costs $75 a day to keep open, and spends $10 for each book it

Mathematics
1 answer:
Papessa [141]3 years ago
4 0
A because I know I’m right because I studied a little bit and I got to get it right
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The height of a standard coffee cup
Zinaida [17]

Answer:

7 centimeters

Step-by-step explanation:

Standard size of a coffee cup is 7 centimeters

7 meters is too big

7 kilometers  is bigger than 7 meter

7 millimeters is too small

7 0
3 years ago
Solve for u.<br> |5u + 15| = 10
Rudiy27

Answer:

-1 and -5

Step-by-step explanation:

You must account for negative u values (which the abs nullifies).

So 5u+15=10 and 5u+15=-10 is what we have to solve for.

As for usual equations, isolate the u variable.

5u + 15 = 10

5u + 15 (-15) = 10 (-15)

5u = -5

\frac{5u}{5}=\frac{-5}{1}

u = -1

Now you can do the same operation for the other equation and you should get u = -5.

Let's make sure we did it right by replacing u with one of our solutions (-1 or -5).

|5(-1)+15| = 10\\10 = 10

That's true. What about the other one?

|5(-5)+15|=10\\10=10

6 0
2 years ago
If 21,986 people in a city received the influenza vaccine, and a study shows that the vaccine is 74.5% effective, how many peopl
Leona [35]
I don’t n is I guessing ok so maybe a
8 0
3 years ago
Read 2 more answers
Solve by factoring<br><br>2n^2+12n+18
Gelneren [198K]

Answer:

Step-by-step explanation:

d/dn(2 n^2 + 12 n + 18) = 4 (n + 3)

Indefinite integral:

integral(18 + 12 n + 2 n^2) dn = (2 n^3)/3 + 6 n^2 + 18 n + constant

Global minimum:

min{2 n^2 + 12 n + 18} = 0 at n = -3

8 0
2 years ago
8x+4(-6x+4)=-6-5x <br><br> With steps please
Shkiper50 [21]

Answer: x=2

Step-by-step explanation:

Expand

8x−24x+16=−6−5x

simplify

−16x+16=−6−5x

add 16 to both sides

16=−6−5x+16x

simplify

16=−6+11x

regroup the terms

16=11x−6

add 6 to both sides

16+6=11x

simplify

22=11x

divide

22/11=x

simplify

2=x

switch sides

x=2

4 0
2 years ago
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