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3 years ago

can someone please help? And can you also explain how to do it, because I forgot the steps on how to do it

Mathematics

1 answer:

alexdok [17]3 years ago

7 0

Answer:

option 3) EF= -7 FG= -7

Step-by-step explanation

X= 1/2

EF= 2X-8

= 2 X 1/2 -8

=1 - 8

EF = -7

FG= 4X -9

= 4X 1/2

2 - 9

FG = -7

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Find the circumstances of the circle

Mkey [24]

The meaning of circumference is to find the distance around a circle or in other words perimeter by using the formula C=2πr or C=πd.

On this case it is asked you to find the circumference of a circle with a diameter of 3 meters, so you will use the formula C=2πr.

C=2πr
C=2(3.14)(3)
C=18.84 meters

The circumference of the given circle is 18.84 meters.

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3 years ago

Write and equati9n of a l8ne that passes through (1,-2) and is perpendicular to -4x+7y=21

yarga [219]

Given:

A line passes through (1,-2) and is perpendicular to $-4x+7y=21$ .

To find:

The equation of that line.

Solution:

We have, equation of perpendicular line.

$-4x+7y=21$

Slope of this line is

$m_1=-\dfrac{\text{Coefficient of x}}{\text{Coefficient of y}}$

$m_1=-\dfrac{-4}{7}$

$m_1=\dfrac{4}{7}$

Product of slope of two perpendicular lines is -1.

$m_1\times m_2=-1$

$\dfrac{4}{7}\times m_2=-1$

$m_2=-\dfrac{7}{4}$

Now, slope of required line is $-\dfrac{7}{4}$ and it passes through (1,-2). So, the equation of line is

$y-y_1=m(x-x_1)$

where, m is slope.

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$4y+7x=7-8$

$7x+4y=-1$

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3 years ago

HELLLLPPPPPPPP PLEASEEEEEEEEE

tatyana61 [14]

Answer:

10.5

Step-by-step explanation:

$KET\cong KIT...... (given)$

$\therefore KE \cong KI.... (csct)$

$\therefore m(KE) =m(KI)$

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$\therefore x=10.5$

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3 years ago

Sklyer has 15 less than twice as many customers as when she started selling newspapers. She now has 155 customers. How many did

arlik [135]

155 = 2x -15
170 = 2x
85 = x

She had 85 when she first started.

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3 years ago

Read 2 more answers

What is the arc length of the subtending arc for an angle of 72 degrees on a circle of radius 4?

shepuryov [24]

First, determine the circumference (C) of the circle, the equation,
C = 2πr
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C = 2π ( 4) = 8π
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S = (8π) x (72 / 360) = 0.8π
Thus, the arc is 0.80π.

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3 years ago

can someone please help? And can you also explain how to do it, because I forgot the steps on how to do it ​

can someone please help? And can you also explain how to do it, because I forgot the steps on how to do it