3 years ago

If 8=−3r+7r, then r= [blank] −−−−−−.

Mathematics

1 answer:

Svetllana [295]3 years ago

8 0

Answer:

$r = 2$

Step-by-step explanation:

$8 = - 3r + 7r \\ 8 = 4r \\ 4r = 8 \\ \\ r = \frac{8}{4} \\ \\ r = 2$

You might be interested in

Which expression is equivalent to 6^2 times 6^6? a. 6^8 b. (6^3)^5 c. 6^12 d. 6^8/6

ratelena [41]

Step-by-step explanation:

Rule:

When exponents multiply, they're adding.

Multiply:

${6}^{2} \times {6}^{6} = {6}^{2 + 6} = {6}^{8}$

Option A is correct.

8 0

2 years ago

The perimeter of a rectangle is 96 yards and the length is 14 yards more than the width what are the dimensions of the rectangle

____ [38]

Answer:

17 yards and 31 yards.

Step-by-step explanation:

Since length is 14 more than width, lets call width: w and length: w+14

So perimeter is 96 so: 2w+2(w+14)=96

2w+2w+28=96 so 4w+28=96

4w=68 and finally w=17

So 17 yards and 31 yards.

6 0

1 year ago

The sum of a number and 12

Blizzard [7]

Answer:

D) n+12

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

Please help I will give 10 pt

Mrac [35]

The expressions 100×10 and the more complicated

(100 - 4a)(10 + a)

are calculating annual (expected) revenue. In 100×10 the 100 is the number of decks and the 10 is the price per deck. In (100 - 4a)(10 + a) the 100-4a is the number of decks and the 10+a is the price per deck. So a must be the amount the price increases.

Answer: amount of price increase, last choice

4 0

3 years ago

Read 2 more answers

Imagine you are driving home from vacation in Oklahoma. You have 1/4 tank of gas left, having driven 200 miles on 3/4 of a tank.

astra-53 [7]

Answer:

sorry idk

Step-by-step explanation:

3 0

3 years ago