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Mila [183]
3 years ago
7

30=7r+5 what’s does r stand for

Mathematics
2 answers:
harkovskaia [24]3 years ago
7 0

Answer:

An unknown variable

Step-by-step explanation:

r is an unknown variable -> the equation is used to solve for it.

kodGreya [7K]3 years ago
3 0

Answer:

In math, r usually stands for radius.

Step-by-step explanation:

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Simplify the two surds then simplify the resulting expression:<br> 2√50 + 3√32
-BARSIC- [3]

Answer: 31.11269837 round your answer if needed to

Step-by-step explanation:

3 0
3 years ago
Kayla buys a video game for $19 plus a 6% tax. Michael buys a volleyball for $18 plus a 6% tax. Enter the difference in the amou
adelina 88 [10]

Answer:

Kayla = $20.14

Michael = $19.08

The Difference = 1.06

Step-by-step explanation:

<em><u>How to solve.</u></em>

First, you need to add up how much Kayla is paying for the video game, plus the 6% tax.

19.00 + 6% = 20.14

Then, you need to do the same with Michael's.

18.00 + 6% = 19.00

To find the difference between how much Kayla and Michael paid for their items, you need to subtract their total.

20.14 - 19.00 = 1.06

and the nearest cent would be 1.10.

<u><em>I hope this helped</em></u>.<em><u>!</u></em>

6 0
3 years ago
Help me with #2 and #3 please
timurjin [86]
2 An angle in a regualr quadrilateral = 90 degrees

3. if  exterior angle = 40 degrees then the number of sides in the plygon

= 360/40  = 9 sides 

So its a  nonagon.
7 0
3 years ago
In six test runs, a truck operated 8, 10, 15, 7, 9, and 11 miles with one gallon of gasoline. at the 95% level of confidence, is
nikdorinn [45]
The mean average of all the test runs are 10 miles. Thus, a mean rate of 10 miles per gallon would be more accurate.
6 0
3 years ago
What is the surface area of a cylinder whose base radius is 7 cm and whose height is 8 cm?
Mnenie [13.5K]

Answer:

659.73

Step-by-step explanation:

i searched up surface area cylinder calculator to get the answer but incase u can't use that

A= 2(pi) r h + 2 (pi) r ^2

in this case it would be

A= 2 (pi) (7) (8) + 2(pi) 7^2

after that u should be able to get 659.73

if u didnt understand the explanation try searching up "surface area cylinder calculator" and it should pop up!

(my fault if the answer is wrong btw)

6 0
3 years ago
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