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PtichkaEL [24]
3 years ago
10

Solve: 17.2 = 8.9 + c c =

Mathematics
1 answer:
vaieri [72.5K]3 years ago
4 0

Answer:

The square root of 8.3, and -8.3

Step-by-step explanation:

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If Sonia practices piano for 1/3 of an hour each day,how long will she have practiced in a week
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Answer:

2 hours and 20 minutes

Step-by-step explanation:

1/3 of an hour is 20 minutes and a week is 7 days. Multiply 20 minutes by 7 days. You get 140 minutes which equals 2 hours 20 minutes

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7) 28 is 35% of what number?​
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80

Step-by-step explanation:

28×100÷35=80

6 0
3 years ago
2. The width of a rectangle is 5 units less than the length. If the area is 150 square units, then find the dimensions of the re
xz_007 [3.2K]

Answer:

  • The length = x = 15 units
  • The width = x-5 = 10 units

Step-by-step explanation:

Let 'x' be the length of a rectangle

As the width of a rectangle is 5 units less than the length.

so

width of rectangle will be = w = x - 5 units

Area = 150 square units

Using the formula

Area = length × width

150=\left(x\right)\left(x-5\right)

150=x^2-5x

x^2-5x=150

Subtract 50 from both sides

x^2-5x-150=150-150

x^2-5x-150=0

\left(x+10\right)\left(x-15\right)=0

if

ab=0\:\mathrm{then}\:a=0\:\mathrm{or}\:b=0\:\left(\mathrm{or\:both}\:a=0\:\mathrm{and}\:b=0\right)

x+10=0\quad \mathrm{or}\quad \:x-15=0

x=-10,\:x=15

As length can not be negative. so

x = 15 units

Hence,

The length = x = 15 units

The width = x-5 = 15-5 = 10 units

5 0
2 years ago
What is the side length of a square with an area of 144x^2?
zvonat [6]
To answer this, we need to know the expression for the area of a square which is the square of its side length or:

Area = a²

Solving for the side length,

a = √area
a = √144x²
a = 12x

Therefore, the side length is 12x.
6 0
3 years ago
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