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3 years ago

20x-8y=-5 10x-4y=-4 Can someone please solve this

1 answer:

7 0

No Solution

When you do the substitution method, you would have the x and y variables equal to zero. In systems of equations, the equations are equal with each other.

20x-8y=-5
10x-4y=-4

20x-8y=-5
-2(10x-4y=-4)

20x-8y=-5
-20x+8y=8

The 20x and -20x cancel out
The -8y and 8y also cancel out. Thus leaving -5 and 8

According to system of equations, the equations must be equal. Additionally, -5 does not equal to 8.

Therefore, the answer is no solution.

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What is the measure for the following ∠? m∠EOD 20 120 140

Eddi Din [679]

Answer:

Part 1) m∠EOD=20°

Part 2) m∠AOD=80°

Step-by-step explanation:

Part 1) Find the measure of angle EOD

we know that °

m∠EOD=m∠EOX-m∠DOX

we have

Observing the figure

m∠EOX=140°

m∠DOX=120°

substitute

m∠EOD=140°-120°=20°

Part 2) Find the measure of angle AOD

we know that °

m∠AOD=m∠DOX-m∠AOX

we have

Observing the figure

m∠AOX=40°

m∠DOX=120°

substitute

m∠AOD=120°-40°=80°

8 0

2 years ago

Find the total area surface of figure

Neporo4naja [7]

Answer:

$92 \:cm^2$

Step-by-step explanation:

$Surface\:_{area}=2\times(\ell\times w +\ell \times h + w \times h)$

$=2\times(8 \times 2 +8 \times 3 + 2 \times 3)$

$=2 \times (16+24+6)$

$=2\times 46$

$=92\: cm^2$

5 0

2 years ago

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Please help middle school math

Alex787 [66]

Answer:

Greater than 7 cm.

Step-by-step explanation:

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2 years ago

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What is the best approximation for the circumference of a circle with a diameter of 300 feet

garri49 [273]

Answer:

The answer is C=942.48

Step-by-step explanation:

You would figure this out by using the formula C=2πr.

So let's break this down.

Circumference (C) equals (=) pi (π) times 2 times the radius of the circle.

Since the problem gave you the diameter which is the length from one side of the circle to the other, you have to divide the diameter in half. Which would give you a radius of 150.

Taking the 150 you would multiply 10*2*π.

Which would give you....(drumrollllll)

C=942.48

I hope this helps!!

p.s. have any more questions? Post them and comment the link!♥, Sadie

3 0

3 years ago

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Find gradient and y-intercept of Y=3x-5

NemiM [27]

Answer:

Slope m (Gradient) = 3

y-intercept: (0, -5)

General Formulas and Concepts:

Algebra I

Slope-Intercept Form: y = mx + b

m - slope

b - y-intercept

Step-by-step explanation:

Step 1: Define

y = 3x - 5

Step 2: Break function

Slope m = 3

y-intercept b = -5

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2 years ago

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