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tester [92]
3 years ago
8

— 4х + 7y = 20 у = 3х + 15

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
6 0

Answer:

x=-5

Step-by-step explanation:

-4x+7(3x+15)=20\\ -4x+21x+105=20\\ 17x+105=20\\ 17x=20-105\\ 17x=-85\\ x=-5

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Your family plans to start a small business in your neighborhood. Your father borrows $10,000 from the bank at an annual interes
valkas [14]

Answer:

$2400

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 8%/100 = 0.08 per year,

putting time into years for simplicity,

36 months ÷ 12 months/year = 3 years,

then, solving our equation

I = 10000 × 0.08 × 3 = 2400

I = $ 2,400.00

The simple interest accumulated

on a principal of $ 10,000.00

at a rate of 8% per year

for 3 years (36 months) is $ 2,400.00.

8 0
3 years ago
(6x^4-5x^3+8x^2-x-20) ÷ (3x-4)​
alekssr [168]

Answer:

Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
Convert 7 feet to inches. There are 12 inches in 1 foot
Ghella [55]

Answer:

84 inches.

Step-by-step explanation:

Just take 12 and multiply it by 7. You get 84 inches as your final answer.

4 0
4 years ago
Will give brainless whatever that means. Due today. The radius of a basketball is 10 inches, and the radius of a soccer ball is
Helen [10]

9514 1404 393

Answer:

  1135.2 in³

Step-by-step explanation:

The volume of a sphere is given by the formula ...

  V = (4/3)πr^3

The difference in volume will be ...

  ∆V = Vb -Vs = (4/3)π(10^3 -9^3) = (4/3)π(1000 -729) = 4/3π·271 . . . cubic in

  ∆V ≈ 1135.2 . . . cubic inches

The basketball has a volume that is 1135.2 cubic inches greater.

_____

If you use 3.14 for π, your answer is 1134.6 in^3.

7 0
3 years ago
Mark wants to use a grid like the ones in exercises 1 and 2 to model the percent equivalent of the fraction 2/3.How many grid sq
Marrrta [24]

Answer:

67 squares or 66.66 squares.

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4 0
3 years ago
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