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2 years ago

Complete the square to solve the equation below.

Mathematics

2 answers:

Goryan [66]2 years ago

8 0

Answer:

D. 2

Step-by-step explanation:

x2 +8x-1=19

x2+8x-20=0

x2+8x +(8/2)^2 - (8/2)^2 -20=0

x2+8x+16-16-20=0

x2+8x-36=0

(x+4)^2 =36

X+4=6

X=6-4. X=6+4

X=2, X=10

jenyasd209 [6]2 years ago

3 0

Answer: X= -10, and X=2

Step-by-step explanation:

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Evaluate the expression for the given values.<br> 12x+5y/3z, where x + 1/2, y = 6 and z = 3

Semmy [17]

Answer:

Step-by-step explanation:

Substitute: $\frac{\frac{12}{2} +5*6}{3*3}$

Cross out the common factor: $\frac{6+5*6}{3*3}$

Calculate the product or quotient: $\frac{6 +30}{3*3}$

Calculate the product or quotient: $\frac{6+30}{9}$

Calculate the sum or difference: $\frac{36}{9}$

Cross out the common factor: $4$

Answer: $4$

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2 years ago

Read 2 more answers

Jack can build 1/5 of a shed in the same time Kyle build 5/8 of a shed. How much of a shed will jack have built when Kyle has fi

nadya68 [22]

Answer:

Step-by-step explanation:

If Kyle can get 5/8 of a shed built in x amount of time, he can get 62.5% done; if Jack can get 1/5 of the shed built in the same time, he can 20% of it done. As a ratio:

$\frac{Kyle}{Jack}:\frac{62.5}{20}$ Kyle gets the whole thing done, 100% of the way, leaving Jack lagging behind at a somewhat lower percentage of the work being done.

$\frac{Kyle}{Jack}:\frac{62.5}{20}=\frac{100}{x}$ and cross multiply to solve for the percentage of the shed built by Jack by the time Kyle gets it completed:

62.5x = 2000 so

x = 32%

4 0

2 years ago

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AnnZ [28]

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2 years ago

A health club charges a one-time sign-up fee and a monthly membership fee. The equation y=30x+40 represents what the health club

riadik2000 [5.3K]

Answer:

$24

Step-by-step explanation:

30X + 40

$24 IS THE RATE OF CHANGE

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2 years ago

What is the value of X?

zepelin [54]

The 3 inside angles of a triangle need to equal 180 degrees.

The angle below the 100 degrees would be 180-100 = 80 degrees.

Now you have 80 and 70, which equals 150 degrees.

Angle X = 180 -150 = 30 degrees

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2 years ago