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Alex17521 [72]
3 years ago
5

Solve 2r – 15 = -9r + 18. r = 0.3 r = -0.3 r = 3 r = -3

Mathematics
1 answer:
Aleksandr [31]3 years ago
8 0

Answer:

r=3

Step-by-step explanation:

Let's solve your equation step-by-step.

2r−15=−9r+18

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A car is traveling at a steady speed. It travels 1 1/2 miles in 2 1/4 minutes. How far will it travel in 41 minutes​? In 1 hour​
Ganezh [65]

Answer:

The car will travel 29 1/3 miles in 44 minutes, 40 miles in an hour.

Step-by-step explanation:

First, find how far the car can travel in one minute.

(1 1/2)/(2 1/4)=(2/3)

Then multiply the amount of time in minutes.

(2/3)*44= 29 1/3

(2/3)*60=40

5 0
3 years ago
Read 2 more answers
Drag expressions into order to show a way to find 3 × 56.
lina2011 [118]
As we could "drag" these together, we could then do it the easy way.

  56
+56
+56
-------
168
------------------------

Or we could also do the following:

56*3:

6*3= 18.

Carry the one. 

5*3 = 15+1 (which was carried). = 16

(16+8) = 168





7 0
3 years ago
Read 2 more answers
What is the sum of x^2 - 3x + 7 and 3x^2 + 5x - 9
Dmitrij [34]

Hey there!

The answer to your question is 4x^2+2x-2

Given:

x^2-3x+7 and 3x^2 +5x-9

First, we can start by adding like terms. The following are like terms:

x^2 and 3x^2

-3x and 5x

7 and -9

Now, we can add these pairs together, giving us:

4x^2

2x

-2

Now, add all this together, and we get our answer as:

4x^2 + 2x - 2

Have a terrificly amazing day!

7 0
3 years ago
PLEASE HELP ASAP!!!!!!
Marina CMI [18]

Answer: -6.8

Step-by-step explanation:

First you have to find the mean of all the #’s so to do that you will have to add all the #’s up including the negatives and you would get -34, after you do that you will have to divide by 5 and get -6.8

8 0
3 years ago
X=17-4y<br> y=x-2<br> answer by substitution
sashaice [31]

Answer:

x=5,y=3

Step-by-step explanation:

the first step is to decide whether you want to substitute y and find x, or substitute x and find y.

(it doesn't matter which way you will choose.If you do the math correctly you will get the correct answer,one way or another).

for example, let's substitute y into the first equation:

x=17-4*(x-2)

so now,we will organize the equation:

x+4x=17+8

5x=25/(÷5)

x=5

now we will substitute x with 5 in the second equation(or the first one,it doesn't matter)in order to find y:

y=5-2

y=3

3 0
4 years ago
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