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miv72 [106K]
3 years ago
12

7 MORE THAN TWICE a number n

Mathematics
1 answer:
Sever21 [200]3 years ago
5 0

Answer:

2n+7

Step-by-step explanation:

7 more than twice n would be:

2n+7

this is because twice n would mean that you'd multiply n by 2, and by 7 more than they mean you would add 7 to that.

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a flower bed is in the shape of triangle with one side twice the length of the shortest side and the third side is 28 feet more
SVEN [57.7K]
X - the shortest side
2x
x + 28

The sum of these must be equal to the perimeter of the flower bed, so 

x + 2x + x + 28 = 184

4 x + 28 = 184  Combined like terms

4x = 156  Subtracted 28 from both sides

x = 39  Divided both sides by 4.

So the dimensions are 39 feet, 78 feet, and 67 feet
3 0
3 years ago
1/a+1/b=c solve for b
Mrac [35]

Multiply it all by ab/1

b + a = abc

subtract a on both sides and subtract abc on both sides

b - abc = -a

divide by -ac on both sides

b = -a/-ac

b = c

I hope that helps

8 0
4 years ago
Can anyone please help me :)
Dovator [93]

Answer:

40^14 over 4^5 then divide 40 by 4 and 14-5 which would be 10^9

Step-by-step explanation:

i think, im not positive but you multiply the whole numbers and add the exponents then you can simplify the numerator and denominator. but you dont  divide the numerator exponets by the 5, you just sutract. if you want i can explain it a lil better in the comments

7 0
3 years ago
A car travels 42 miles for every 2 gallons of gasoline. What is the unit rate?
svetoff [14.1K]

Answer:

21 miles per 1 gallon

Step-by-step explanation:

The unit rate is how many to 1 so, 42 divided by 2 equals 21 so, the answer is given.

PLZ MARK BRAINLIEST!!!

5 0
3 years ago
Read 2 more answers
Let g(x) = x² - 3 and h(x) = 2x + 5. Find g(h(x)).
Arisa [49]

Answer: 4x^2+20x+22\\\\

========================================

Work Shown:

g(x) = x^2 - 3\\\\g(h(x)) = (h(x))^2 - 3\\\\g(h(x)) = (2x+5)^2 - 3\\\\g(h(x)) = (2x+5)(2x+5) - 3\\\\g(h(x)) = 4x^2+10x+10x+25 - 3\\\\g(h(x)) = 4x^2+20x+25 - 3\\\\g(h(x)) = 4x^2+20x+22\\\\

Explanation: I replaced every x with h(x) in step 2. In step 3, I replaced h(x) with 2x+5 just on the right hand side only. From there, expand and simplify.

7 0
3 years ago
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