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lara31 [8.8K]
3 years ago
12

Help help math math math please

Mathematics
1 answer:
xz_007 [3.2K]3 years ago
3 0

Answer:

x = 5

Step-by-step explanation:

2x+15 = 4x+5 <em>(because they are corresponding angles)</em>

10 = 2x

x = 5

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) Which statements about -3 and -7 are true? Choose ALL the correct answers.
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Answer: -3 is greater than -7 and the absolute value of -3 is less than the absolute value of -7.

Step-by-step explanation:

For NEGATIVE numbers, the closer the value is to 0, the greater it is. -3 is closer to 0 than -7 is, so -3 is greater than -7. For POSITIVE numbers, the further away the number is from 0, the greater it is. The absolute value of -3 is 3 and the absolute value of -7 is 7, and 7 is farther away from 0 than 3 is. So, the absolute value of -3 is less than the absolute value of -7. Hope this helps!

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3 years ago
A room in a house is shown on a blueprint. The blueprint has a scale of 5 inches : 8 feet. How long is the actual wall? A door i
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The answer would be 48 feet
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Pleases help im stuck on both ​
AysviL [449]
A) f(x) = 2 - 2x
f(0) = 2 - 2(0) = 2 - 0 = 2
f(2) = 2 - 2(2) = 2 - 4 = -2
f (4) = 2 - 2(4) = 2 - 8 = -6

b)
___________
| y = 2x - 5 | y |
________ |__
-2 | -9
-1 | -7
0 | -5
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5 0
3 years ago
What is 0.000000685 written in scientific notation?
oee [108]

Answer:

D. 6.85x10^-7


5 0
3 years ago
The naturalist views an elephant in the distance, but he doesn’t know how far away the elephant is from him. He takes a view to
andrezito [222]

Answer:

10.11 feet

Step-by-step explanation:

Let H ft be the elephant's height and x ft be the initial distance from naturalist to the elephant.

1. Naturalist takes a view to find the a 22 degree angle of elevation, then

\tan 22^{\circ}=\dfrac{H}{x}.

2. Naturalist moves backwards from the elephant pacing off a distance of 27 feet, the distance from naturalist to the elephant becomes (x+27) ft. He takes a second view and determines a new angle of elevation of 11 degrees. Then

\tan 11^{\circ}=\dfrac{H}{x+27}.

3. Solve the system of two equations:

\left\{\begin{array}{l}\tan 22^{\circ}=\dfrac{H}{x}\\\tan 11^{\circ}=\dfrac{H}{x+27}\end{array}\right.\Rightarrow \dfrac{x+27}{x}=\dfrac{\tan 22^{\circ}}{\tan 11^{\circ}}\approx 2.0785,\\ \\ \\x+27=2.0785x,\\ \\1.0785x=27,\\ \\x\approx 25.0347\ ft.

Then

H=x\cdot \tan 22^{\circ}\approx 10.11\ ft.

3 0
3 years ago
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