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tekilochka [14]
3 years ago
13

Solve the equation. Check your solutions when necessary.2x² − 7x = 4

Mathematics
1 answer:
prisoha [69]3 years ago
5 0

Answer:

x= -1/2 = -0.500

x=4

Step-by-step explanation:

2x^2-7x-4=0

2x^2-8x+1x-4=0

2x(x-4)+1(x-4)=0

(2x+1)(x-4)=0

2x+1=0...2x= -1.. x= -1/2         x-4=0 .. x=4

checking the solution

2(-1/2)^2-7(-1/2)=4.....  4=4

2(4)^2-7(4)=4....... 4=4

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Jackson can lay 6000 ft² of tile in 3 h.
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Answer:

2000 ft^2/h

Step-by-step explanation: Because 6000 divided by 3 is 2000


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3 years ago
Read 2 more answers
When Elijah left his house in the morning, his cell phone battery was partially
lions [1.4K]

Answer:

The slope is -4.5

The slope means that Elijah's phone battery will decrease by 4.5 percent each hour.

Step-by-step explanation:

In the equation y = mx + b, m is the slope.

The coefficient in the equation B = 27 – 4.5t is -4.5. This means that -4.5 is the slope of the equation.

In the context of this problem, the slope will represent the percent that Elijah's phone battery will decrease per hour.

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8 0
3 years ago
Evaluate x+y when x=13 and y=−74. Write your answer as a fractionin simplest form
Fofino [41]

<u>The value of the expression is -35.</u>

<u>Step-by-step explanation:</u>

<u>Consider the provided expression.</u>

<u>3x + y </u>

<u>We need to find the value of the expression for x=13 and y=−74 .</u>

<u>Substitute the value of x=13 and y=−74  in the above expression as shown:</u>

<u>3 (13) + (-74)</u>

<u>39 - 74 </u>

<u>-35</u>

<u> the value of the expression is -35.</u>

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2 years ago
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3 years ago
4) Suppose y varies inversely with the SQUARE ROOT of x.
Savatey [412]

Answer:

Variation equation: y = k/√x

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Variation Equation by plugging the value of k: y = 200/√x

Step-by-step explanation:

If y varies inversely with the SQUARE ROOT of x, then;

y = k/√x

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100 = k/2

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k = 200

Substitute into the expression

y = k/√x

y = 200/√x

7 0
3 years ago
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