3 years ago

Graph the linear equation and answer each of the following questions.

Mathematics

1 answer:

frozen [14]3 years ago

7 0

It cald desho loiwwn osnsnei vsbso vovo cexo

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I need these three solved. I have a lot of math to do. the directions say solve each system of equations using substitution. sho

alekssr [168]

Answer:

x + 2(x + 1) = 8 --> x = 2

y = 2 + 1 = 3

3(9 + 2y) + 5y = 20 --> y = -7/11

x = 9 + 2(-7/11) = 85/11

3(-1 - 2y) + 5y = -1 --> y = -2

x = -1 - 2(-2) = 3

6 0

2 years ago

Investments historically have doubled every 9 years. if you start with 2,000 investment, how much money would you have after 45

77julia77 [94]

Answer: 64,000

Equation: 2,000*2^(45/9)

4 0

2 years ago

The radius of a circle is 4 feet. What is the circle's area? Use 3.14 for .

Serga [27]

Answer:

Approximately 50 square feet (50.24 to be exact)

Step-by-step explanation:

If you're using 3.14 for π, and the area of a circle is A=πr2,

(3.14)(4)^2 =?

(3.14)(16) = 50.24

Therefore the answer would be about 50 square feet.

3 0

2 years ago

Read 2 more answers

if julie ran 3.6 miles from home to the gym and then walked 0.7 miles to the store she then ran from the store home if her total

o-na [289]

So,

Home ---- gym = 3.6 mi.
gym ---- store = .7 mi.
store ----- home = x

3.6 + .7 + x = 7.2 mi.

Collect Like Terms

4.3 + x = 7.2

Subtract 4.3 from both sides
x = 2.9

The distance from the store to her home is 2.9 miles.

4 0

2 years ago

Julie will build a rectangular pen for her dog against a barn. A wall from the barn will form one side of the pen. She has 32 m

MAXImum [283]

Answer:

<h3> The width (side perpedicular to the barn): <u>x = 8 m</u></h3><h3> The lenght (side parallel to the barn): <u>y = 16 m</u> </h3>

Step-by-step explanation:

x - the width of the barn

She has 32 m of fencing so for the lenght remain (32-2x) m of fencing:

y = 32 - 2x

Area of the fencing: A = x•y

A(x) = x•(32 - 2x)

A(x) = -2x² + 32x ← quadratic function

The maximum value of quadratic function occurs at: $x=-\frac b{2a}$

a = -2, b = 32

$x=-\frac b{2a}=-\frac{32}{2\cdot(-2)}=-(-8)=8$

32-2x = 32 - 2•8 = 16

4 0

2 years ago