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4 years ago

Solve for x. Write the smaller solution first, and the larger solution second. (x−7)(−4x−2)=0

1 answer:

5 0

Solve for x:
(-4 x - 2) (x - 7) = 0

Split into two equations:
-4 x - 2 = 0 or x - 7 = 0

Factor constant terms from the left hand side:
-2 (2 x + 1) = 0 or x - 7 = 0

Divide both sides by -2:
2 x + 1 = 0 or x - 7 = 0

Subtract 1 from both sides:
2 x = -1 or x - 7 = 0

Divide both sides by 2:
x = -1/2 or x - 7 = 0

Add 7 to both sides:
Answer: x = -1/2 or x = 7

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Alicia runs for exercise. If Alicia runs 24 miles in 6 days, How many feet does she run per day.

dimaraw [331]

Answer:

Alicia runs 21120 feet per day

Step-by-step explanation:

24 miles/6 days 5280 ft/1 mile

you would then multiply 24 by 5280 to get 126760

and afterwards you would divide 126760 by 6 to get 21120 ft per day

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3 years ago

How do you find a regression equation

elena55 [62]

Answer:

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Step-by-step explanation:

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3 years ago

Y = 3/5х + 2 on a graph

Andrei [34K]

Answer:

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Step-by-step explanation:

HOPE THAT HELPS YOU

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3 years ago

The area of a rectangle is 47.5 square centimeters. The

vodka [1.7K]

SHORT ANSWER: 84cm

Let width = w

Let length = w + 5

The area of a rectangle is found by multiplying its width by length and the problem states that the area is 84 cm2.

(Width)(Length) = 84

(w)(w + 5) = 84

w2 + 5w = 84

w2 + 5w - 84 = 0

(w + 12)(w -7) = 0

w + 12 = 0

w = -12

The width of a rectangle can't be NEGATIVE!!! Forget about that!

w - 7 = 0

w = 7

Now go back to naming the variables and replace the w with 7.

Length = w + 5 = 7 + 5 = 12

Width is 7 cm. Length is 12 cm.

Check it. Is 7 x 12 = 84? Yes.

7 0

3 years ago

Read 2 more answers

In a town survey, residents were asked whether they would approve of a tax increase to build a new library. Four-sevenths of the

swat32

Answer: (A) The fraction of residents opposed to the project was three-sevenths (3/7)

(B) The total number of residents is 2,128.

Step-by-step explanation: If the number of residents in support of the building project is expressed as a fraction of the total number, then the total number can be expressed as 1. That means we should have two fractions, those in support and those not in support and their addition should be equal to 1.

Hence if the total is 1 and 4/7 are in support, the fraction of those opposed (let that be y) can be calculated as

y = 1 - 4/7

y = 7/7 - 4/7

y = (7 - 4)/7

y = 3/7

Also, the number of residents not in support is 912 (which is 3/7 of the total). That means 912 is three out of seven of f the total population. In other words,

3/7 = 912/x

(Where x is the total population)

By cross multiplication we now have

3x = 912 x 7

x = 6384/3

x = 2128

Therefore the total population of residents is 2,128.

6 0

3 years ago