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3 years ago

- 5 ( 4x + 2 ) + 2x + 1 = - 151

Mathematics

2 answers:

Viktor [21]3 years ago

6 0

Answer:

-5 * (4x + 2) + 2x + 1 = -151

-20x - 10 + 2x + 1 = -151

-18x - 9 = -151

-18x = -142

x = 71/9 = 7 8/9

ELEN [110]3 years ago

5 0

Answer:

x=140/-18

x=-7+7/9

Step-by-step explanation:

-5(4x-2)+2x+1=151

We move all terms to the left:

-5(4x-2)+2x+1-(151)=0

We add all the numbers together, and all the variables

2x-5(4x-2)-150=0

We multiply parentheses

2x-20x+10-150=0

We add all the numbers together, and all the variables

-18x-140=0

We move all terms containing x to the left, all other terms to the right

-18x=140

x=140/-18

x=-7+7/9

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Simplify 1/2(8y-10z)-(3y+z)

sashaice [31]

1/2(8y-10z)-(3y+z)
= 4y - 5z - 3y - z
= y - 6z

hope it helps

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3 years ago

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Please help: 12x^4(-5/6x^3y^2) If possible, include steps Thanks.

tangare [24]

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Question
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$12x^4(- \frac{5}{6} x^3y^2)$

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Multiply the constant: 12 x (-5/6)
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$-10x^4( x^3y^2)$

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Multiply the x (we add the power together when we multiply)
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$-10x^7y^2$

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2 years ago

You receive two quarters, one dime, and four pennies back in change. Write the amount as a fraction in simplest form

Ahat [919]

$\frac{50}{100} = \frac{2}{4} = \frac{1}{2}$
$\frac{10}{100} = \frac{1}{10}$
$\frac{4}{100} = \frac{2}{50} = \frac{1}{25}$
$\frac{1}{2} = .50$
$\frac{1}{25} = .04$
$\frac{1}{10} = .10$

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3 years ago

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a jogger runs 4 miles per hour faster downhill than uphill. if the jogger can run 5 miles downhill in the same time that it take

Serga [27]

Answer: the rate uphill is 6 mph.

The rate downhill is 10 mph

Step-by-step explanation:

Let x represent the rate at which the jogger ran uphill.

The jogger runs 4 miles per hour faster downhill than uphill. This means that speed at which the jogger ran downhill is (x + 4) mph

Time = distance/speed

if the jogger can runs 5 miles downhill, then the time taken to run downhill is

5/(x + 4)

At the same time, the jogger runs 3 miles uphill. It means that the time taken to run uphill is

3/x

Since the time is the same, it means that

5/(x + 4) = 3/x

Cross multiplying, it becomes

5 × x = 3(x + 4)

5x = 3x + 12

5x - 3x = 12

2x = 12

x = 12/2

x = 6

The rate downhill is 6 + 4 = 10 mph

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3 years ago

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Find the value of X, Z and Y.

FromTheMoon [43]

Answer:

x = 5; y = 138, z= 42

Step-by-step explanation:

4x- 17 = 3 [ opposite sides of a parallelogram are equal]

4x = 3+ 17 = 20; X= 20/4 = 5

138 + Z = 180( angle on a straight line)

Z is an alternate angles to the remaining angle off 138 forming the straight line.

z= 180-138 = 42 degrees

Y = 138 [ opposite angles of a regular quadilareral been equal]

6 0

3 years ago