3 years ago

How long is each wire?

Mathematics

1 answer:

Yanka [14]3 years ago

6 0

Answer:

Its 50 feet. You only have to read the bottom

Step-by-step explanation:

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Resolver la siguiente ecuación por eliminación o sustitución: a-8b= -9 a-2b= -7

Crazy boy [7]

Answer: Solution: $a=\dfrac{-19}{3}$ and $b=\dfrac{1}{3}$ .

Step-by-step explanation:

The given pair of equations:

$a-8b= -9\ ...(i)\\\\ a-2b= -7\ ...(ii)$

Eliminate equation (i) from (ii) , we get

$-2b-(-8b)=-7-(-9)\\\\\Rightarrow\ -2b+8b=-7+9\\\\\Rightarrow\ 6b=2\\\\\Rightarrow\ b=\dfrac{1}{3}$

Put value of b in (ii) , we get

$a-2\times\dfrac{1}{3}=-7\\\\\Rightarrow\ a=-7+\dfrac{2}{3}\\\\\Rightarrow\ a=\dfrac{-21+2}{3}\\\\\Rightarrow\ a=\dfrac{-19}{3}$

Solution: $a=\dfrac{-19}{3}$ and $b=\dfrac{1}{3}$ .

4 0

3 years ago

Really need help on #15 please.

ollegr [7]

Step-by-step explanation:

Let's call L the length and W the width. The length is 10 feet longer than the width, so:

L = W + 10

The area is the length times width, so:

119 = LW

Substituting:

119 = (W + 10) W

119 = W² + 10W

0 = W² + 10W − 119

0 = (W + 17) (W − 7)

W = -17 or 7

Since W must be positive, W = 7.

L = W + 10

L = 17

The length and width are 17 feet and 7 feet, respectively.

5 0

3 years ago

10.) If a system of equations are dependent what is unique about the lines 2 point

MrRa [10]

Step-by-step explanation:

can we have the picture of the graph?

5 0

3 years ago

The cost of Samantha's 15th birthday party depends on the number guest. The hall charges $250 for the use of the hall plus $12 p

Scorpion4ik [409]

Answer:

Equation: y=x(12)+250

Total cost: $550

3 0

3 years ago

The difference between a number and seven is less than or equal to -3

Scorpion4ik [409]

X-7 < -3
Remember that the less than or equal to has a line underneath it!

6 0

3 years ago

Read 2 more answers