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olga2289 [7]
3 years ago
7

7=8 + r/15 Simplify, with steps pleaseee

Mathematics
2 answers:
Crazy boy [7]3 years ago
8 0

Answer:

7 = 8 +  \frac{r}{15}  \\ 7 - 8 =  \frac{r}{15}  \\  - 1 = \frac{r}{15}  \\  \therefore \: r =  - 15

laila [671]3 years ago
3 0

Answer:

Step-by-step explanation:

I think you mean solve for r, do you not?

7   =   8 + r/15                          Subtract 8 from both sides

-8     -8

-1   =  r/15                                Multiply both sides by 15

-1 * 15 = 15 * r / 15                   Combine

-15            = r

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A circle has a radius of 2 meters. find the exact circumference of this circle in terms of pi
VLD [36.1K]

Answer:

See below.

Step-by-step explanation:

The circumference of a circle is 2\pi r

We know that the radius is 2 meters, so:

2(2) \pi

4\pi meters.

5 0
3 years ago
A map has a scale of 1 in: 25 mi. Two cities are 175 mi apart. How far apart are they on the map?
myrzilka [38]
Ratio = 1/25
Let, the distance b/w cities on map = x

It would be: 1/25 = x/175
x = 175/25
x = 7

In short, Your Answer would be 7 in

Hope this helps!
4 0
3 years ago
Solve the inequality <br> 5x+2 &lt; 32
AnnyKZ [126]

Answer:

x<6

Step-by-step explanation:

First, let's work on the left hand side of your inequality, the 5x+2

This means, for instance, to see if it can be simplified at all.

Multiply x and 5

Multiply x and 1

The x just gets copied along.

The answer is x

x

5*x evaluates to 5x

5*x+2 evaluates to 5x+2

So, all-in-all, the left hand side of your inequality can be written as: 5x+2

Now, let's work on the right hand side of your inequality, the 32

The right hand side of your inequality can be written as: 32

So with these (any) simplifications, the inequality we'll set out to solve is:

5x+2 ‹ 32

Move the 2 to the right hand side by subtracting 2 from both sides, like this:

From the left hand side:

2 - 2 = 0

The answer is 5x

From the right hand side:

32 - 2 = 30

The answer is 30

Now, the inequality reads:

5x ‹ 30

To isolate the x, we have to divide both sides of the inequality by the other "stuff" (variables or coefficients)

around the x on the left side of the inequality.

The last step is to divide both sides of the inequality by 5 like this:

To divide x by 1

The x just gets copied along in the numerator.

The answer is x

5x ÷ 5 = x

30 ÷ 5 = 6

The solution to your inequality is:

x ‹ 6

8 0
2 years ago
Read 2 more answers
What's the answer to this
lyudmila [28]
8(14-9)+5
________
2
3. + 6


8(5)+5
______
9 + 6


40 + 5
————
15


45
____
15


= 3
4 0
3 years ago
You have two nickels three dimes and a quarter. Using at least one of each coin, how many different amounts of money can you mak
Slav-nsk [51]
2 nickels (5 cents each)
3 dimes (10 cents each)
1 quarter (25 cents)

1 nickel, 1 dime, 1 quarter
5 + 10 + 25 = 40

2 nickels, 1 dime, 1 quarter
5(2) + 10 + 25 = 45

1 nickel, 2 dimes, 1 quarter
5 + 10(2) + 25 = 50

1 nickel, 3 dimes, 1 quarter
5 + 10(3) + 25 = 60

2 nickels, 2 dimes, 1 quarter
5(2) + 10(2) + 25 = 55

2 nickels, 3 dimes, 1 quarter
5(2) + 10(3) + 25 = 65

You can make 6 different amounts. 
You could also find this by multiplying however many coins you have all together.
2 * 3 * 1 = 6
6 0
3 years ago
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