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2 years ago

What is -3(4x + 3) +5x

Mathematics

1 answer:

Hoochie [10]2 years ago

3 0

Answer: ×=1.29

Step-by-step explanation:

Open the brackets

-12x +9 +5x

-12x+5x=-9

-7x= -9

Divide both sides by -7

X=9/7 =1.29

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Name the property used to make the conclusion. If 13=x, then x=13.

Marina86 [1]

That property would be the Symmetric Property of Equality

7 0

2 years ago

The graph is shown for the equation y = –x + 4.

ivann1987 [24]

Answer:

Option C. $y=-\frac{1}{2}(2x-8)$

Step-by-step explanation:

we know that

If a system of two linear equations has an infinite number of solutions, then both equations must be identical

The given equation is

$y=-x+4$

Verify each case

Option A. we have

$y=-4(x+1)$

apply distributive property

$y=-4x-4$

Compare with the given equation

$-x+4 \neq -4x-4$

Option B. we have

$y=-(x+4)$

remove the parenthesis

$y=-x-4$

Compare with the given equation

$-x+4 \neq -x-4$

Option C. we have

$y=-\frac{1}{2}(2x-8)$

apply distributive property

$y=-x+4$

Compare with the given equation

$-x+4=-x+4$

therefore

This equation with the given equation form a system that has an infinite number of solutions

Option D. we have

$y=x+4$

Compare with the given equation

$-x+4 \neq x+4$

7 0

2 years ago

The quantity demanded x for a certain brand of MP3 players is 100 units when the unit price p is set at $80. The quantity demand

Cerrena [4.2K]

Answer:p = (2100 - x)/25

Step-by-step explanation:

According to the law of demand, when the price,p of the brand of MP3 players is is high, the quantity,x of the brand of MP3 players demanded would be low and when the price,p of the brand of MP3 players is is low, the quantity,x of the brand of MP3 players demanded would be high.

To derive the demand equation, we would apply the slope intercept form of equation which is expressed as

y = mx + c

Where

m = slope

c = intercept

The slope, m would be

(y2 - y1)/(x2 - x1)

Slope = (1100 - 100)/(40 - 80) = 1000/-40

Slope = - 25

To find the y intercept, we would substitute m = - 25, y = 1100 and x = 40 into y = mx + c. It becomes

1100 = - 25 × 40 + c

1100 = - 1000 + c

c = 1100 + 1000 = 2100

y = - 25x + 2100

Therefore, the demand equation is

x = - 25p + 2100

25p = 2100 - x

p = (2100 - x)/25

4 0

2 years ago

!! Need help with the problem in the photo. !!

lianna [129]

Answer:

B $3x-2y=10$

Step-by-step explanation:

This is correct because when solved it has the same slope as line k.

The slope of k is 3/2.

$3x-2y=10$

first subtract 3x from both sides

$-2y=-3x+10$

next divide both sides by -2

$y=3/2x-5$

this shows that the slope 3/2 is the same as line k

6 0

2 years ago

Read 2 more answers

Pls help I’ll give brainliest

nikdorinn [45]

Answer:

can't see it too small talk a shot little bit close

7 0

2 years ago