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Angelina_Jolie [31]
3 years ago
12

Help pls- And now brainly is making me type more soo-​

Mathematics
1 answer:
qwelly [4]3 years ago
3 0

Answer:

72.32

Step-by-step explanation:

Angle in a straight line add up to 180. Using that you are able to find out x.

So 8x+7x+44.4 = 180

15x+44.4 = 180

15x = 135.6

x = 9.04

8*9.04 = 72.32

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Genevieve is 3 years older than twice her brother’s age. Genevieve is 21 years old. Write an equation to find her brother’s age.
Simora [160]

Answer:

her brother is 9

Step-by-step explanation:

21-3=18   18 divided by 2 = 9

7 0
2 years ago
Read 2 more answers
HELP I’ll give you brainliest <br> This is timed I have 5 minutes
DiKsa [7]
Pretty sure it’s y=(x-5)^2+7
4 0
3 years ago
1. If two angles share a vertex and one side they are called _______.
wel

Answer:

1. adjacent angles

2. supplementary angles

3. Angle G = 144 Angle H = 36

4. 45 degrees

Step-by-step explanation:

For #3, u can make an equation to help solve:

4x + x =  180

5x = 180

x = 36

For #4, since complementary angles = 90, u can subtract 45 from 90 to get ur answer.

90 - 45 = 45

hope this helps!!

6 0
3 years ago
Can someone walk me through it
Gre4nikov [31]
Answer: x = 123
--------------------------------------------
--------------------------------------------

Here are the basic steps:

Step 1) Find the measure of angle 7 (near the 35 degree angle)
Step 2) Find angle 6 (in the center; bottom angle)
Step 3) Use angle 6 to find the value of x
-----------------
Let's go through those steps mentioned
-----------------
Step 1) Finding the measure of angle 7

We see that the 35 degree angle and angle 7 combine to form a 90 right angle. So they must add to 90 degrees

(angle 7) + 35 = 90
(angle 7) + 35 - 35 = 90 - 35
angle 7 = 55

So angle 7 is 55 degrees. We'll use it on the next step
-----------------
Step 2) Finding the measure of angle 6

We'll use the result from step 1. The triangle with angle 7, angle 6, and the 68 degree angle will be focused on here. Recall that for any triangle, the three angles must add to 180 degrees. 

So,
(angle 7) + (angle 6) + 68 = 180
(55) + (angle 6) + 68 = 180
(angle 6) + 55 + 68 = 180
(angle 6) + 123 = 180
(angle 6) + 123 - 123 = 180 - 123
angle 6 = 57

So we now know that angle 6 is 57 degrees
-----------------
Step 3) Find x

We now use the fact that angle 6 and angle x are a linear pair. They combine to form a straight line, or straight angle. In other words they add to 180 degrees (they are supplementary angles)

So,
(angle 6) + x = 180
(57) + x = 180
x + 57 = 180
x + 57 - 57 = 180 - 57
x + 57 - 57 = 123
x = 123
-----------------
Side note: we can use the exterior angle theorem to skip over step 2. To do this, we add up angle 7 (which was 55 degrees) to 68 to get 123 degrees which is the same answer. 

6 0
3 years ago
Look at the triangular prism. Work out the volume of the prism.
xz_007 [3.2K]

Answer:

See explanation

Step-by-step explanation:

The question has missing details, as the diagram of the prism is not shown.

However, I'll solve using a general rule.

The volume of a triangular prism is:

Volume = \frac{1}{2}* b * h * l

Where

b = base

h = height

l = length

Take for instance:

b = 20cm

h = 10cm

l = 5cm

The volume is:

Volume = \frac{1}{2} * 20cm * 10cm * 5cm

Volume = 10cm * 10cm * 5cm

Volume = 500cm^3

Another instance (see attachment).

From the attachment:

b = 4.5cm

h = 5cm

l = 8cm

The volume is:

Volume = \frac{1}{2} * 4.5cm * 5cm * 8cm

Volume = 2.25cm * 5cm * 8cm

Volume = 90cm^3

7 0
3 years ago
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