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3 years ago

Explain your answer !! Have a nice day Will give braisnlt

Mathematics

1 answer:

liubo4ka [24]3 years ago

8 0

Answer:

$x=3$

$y=-4$

Step-by-step explanation:

$4x+5y=-8$ ----------- (1)

$-4x-4y=4$ -----------(2)

Adding equation (1) and (2)

$4x+5y-4x-4y=-8+4$

$y=-4$

Substitute y=-4 in equation (1) or (2)

$4x+5(-4)=-8$

$4x-20=-8\\4x=-8+20\\4x=12\\x=3$

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Use a diagram to name each of the following pairs of angles. If the name doesn't exist say none

nirvana33 [79]

Answer:

see below

Step-by-step explanation:

This is a vocabulary problem, identifying the names of things on a diagram.

Angles are "interior" when they are between the "parallel" lines. They are "exterior" when they are outside those lines. They are "alternate" if they are on opposite sides of the transversal, and "same side" if they are not.

They are "vertical" if they share a vertex and have opposite rays for sides, and they are "corresponding" if they are in the same quadrant of the intersection of crossing lines. (1, 5, 9, 13 are "corresponding", for example.)

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3 years ago

A parallelogram has sides of length 7.7 millimeters and 17.2 millimeters. What is the perimeter?

Arlecino [84]

Solutions

We know that a rectangle has four sides and the perimeter of a rectangle is the distance around the outside of the rectangle.The opposite sides of a rectangle are congruent To find the perimeter you have to use the formula 2 × (Side A + Side B).

We have the side lengths 7.7 mm and 17.2 mm.

Solve

2 × (Side A + Side B)
2 × ( Side A (7.7) + Side B (17.2) )
= (7.7 x 2) + (17.2 x 2)
= 49.6

The perimeter is 49.6 mm².

6 0

3 years ago

Read 2 more answers

How much will 1 pound of peppers cost?how much will 3.5 pounds of peppers cost?

sveta [45]

Answer:

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Step-by-step explanation:

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3 years ago

X^2-4x+c find the value of c

Sonbull [250]

Answer:

$c = 4$

Step-by-step explanation:

Given

$x^2 - 4x + c$

Required

Find c

The question is incomplete. However, I'll assume the expression is a perfect square.

To find c, we make use of the following formula

$c = (\frac{b}{2})^2$

Where

$ax^2 + bx + c$

By comparison with $x^2 - 4x + c$

$a =1$

$b = -4$

So, $c = (\frac{b}{2})^2$ becomes

$c = (\frac{-4}{2})^2$

$c = (-2)^2$

$c = 4$

The value of c that makes the expression, $x^2 - 4x + c$ a perfect square is 4 and the expression is: $x^2 - 4x + 4$

8 0

3 years ago

After sailing 12 mi, a sailor changed direction and increased the boat's speed by 4 mph. an additional 18 mi was sailed at the i

inessss [21]

Let the speed for the first 12 mi be x mi/h, the speed for 18 mi was (x+4) mi/h
thus given that
time=distance/speed
the average time will be:
3=(12+18)/(x+x+4)
3=30/(2x+4)
solving for x we get
3(2x+4)=30
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6x=24
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Answer: 12 mi/hr

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2 years ago