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3 years ago

6

A pair of equations is shown below:

1 answer:

ArbitrLikvidat [17]3 years ago

4 0

I would use subsitution because both are already equal to a single variable

set both equal since both equal y
8x-9=y=4x-1
8x-9=4x-1
minus 4x both sides
4x-9=-1
add 9 boh sides
4x=10
divide by 4
x=10/4=5/2
sub for x

y=4x-1
y=4(10/4)-1
y=10-1
y=9

(5/2,9) is solution

A. work shown above
B. (5/2,9) or (2.5,9)

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A regular polygon has 20 sides the measure of an exterior angle of polygon is

mote1985 [20]

Answer:

198 degrees

Step-by-step explanation:

Such a shape is called a 20-gon, such shapes have an interior angle of 162. Hence, the exterior angle = 360 (Complete angle) - 162 (The interior anlge) = 198 degrees, Hope my answer helps you, Thank you, and please add me as brainliest! Thanks

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3 years ago

A cylindrical candle has a volume of approximately 400cm^3 and is 8 cm tall. What is the radius of the candle?

katrin2010 [14]

Answer:

<h2><u>Solution</u><u> </u><u>:</u><u>-</u></h2>

We know that

V = πr²h

400 = 22/7 × r² × 8

400 × 7 = 22 × 7r²

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6 0

2 years ago

Read 2 more answers

PLEASE HEP ME QUICK!!!!: Tom travels between the two mile markers shown and then finds his average speed in miles per hour. Sele

slega [8]

Answer:

$speed=\frac{195\ miles}{3\ hours}$

$3\ hours=\frac{195\ miles}{speed}$

$3\ hours*(speed)=195\ miles$

Step-by-step explanation:

we know that

The speed is equal to divide the distance by the time

Let

x -----> the distance in miles

y ----> the time in hours

$speed=\frac{x}{y}$

we have

The distance is equal to subtract 35 miles from 230 miles

$x=230-35=195\ miles$

The time is equal to subtract 1:30 pm from 4:30 pm

$y=4:30\ pm-1:30\ pm=3\ hours$

substitute in the formula of speed

$speed=\frac{195\ miles}{3\ hours}$

<em>Isolate 3 hours</em>

$3\ hours=\frac{195\ miles}{speed}$

<em>Isolate 195 miles</em>

$195\ miles=3\ hours*(speed)$

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2 years ago

Philip has $2,000 and spend $23.75 on supplies. He divides the remaining amount equally among his 8 employees. How much doeseach

liraira [26]

Take 2,000 - 23.75
1976.25
then take 1976.25 divided by 8

Rounds to $247. 03

4 0

3 years ago

Can someone please explain The measure of angle A to the nearest tenth of a degree is:

Ratling [72]

Answer:

A =19.5

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

sin A= opp/ hyp

sin A = 3/9

Take the inverse sin of each side

sin ^-1 sin A = sin ^-1 (3/9)

A =19.47122063

To the nearest tenth of a degree

A =19.5

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2 years ago

Read 2 more answers