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adelina 88 [10]
3 years ago
11

Andrew spent 75% of his $20 allowance to go to the movies. How much did he spend? Use at least 2 strategies.

Mathematics
1 answer:
earnstyle [38]3 years ago
4 0

Answer:

$15

Step-by-step explanation:

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need help with error analysis assingment, im in high school and ive always struggled with math alot pls help
valina [46]

Given

A) The angles A and B are supplementary.

If,

\begin{gathered} \angle A=x+6 \\ \angle B=7x+30 \end{gathered}

B) The figure,

To find

A) The value of x.

B) The value of x.

Explanation:

A) It is given that,

Angle A and angle B are supplementary.

Then,

\angle A+\angle B=180\degree

Hence, the error is in the statement,

Since the angles are supplementary, when added together they equal 90.

As, the correct answer is when added together they equal 180.

That implies,

\begin{gathered} x+6+7x+30=180 \\ 8x+36=180 \\ 8x=180-36 \\ 8x=144 \\ x=\frac{144}{8} \\ x=18\degree \end{gathered}

Hence, the value of x is 18 degrees.

B) It is given that,

From, the figure the given angles are interior angles.

Also, the interior angles on the same side of the transversal is supplementary.

Which means when you add them they equal 180.

Hence, the error is in the statement,

Since the angles are adjacent, they are complementary angles.

Which means when you add them they equal 180.

As, the angles are interior angles on the same side of the transversal.

Also,

\begin{gathered} 64+x=180 \\ x=180-64 \\ x=116\degree \end{gathered}

Hence, the value of x is 116 degrees.

6 0
2 years ago
Yesterday, there were 45 problems assigned for math homework. Malia got 36 out of 45
Darina [25.2K]

Answer:80

Step-by-step explanation: if you do 45:100% and then x36 you get the result

8 0
3 years ago
Read 2 more answers
Which expression represents the volume, in cubic units, of the shaded part of the sphere? four-thirdsπ(103) four-thirdsπ(43) fou
oee [108]

The volume of the shaded part in cubic units is  4/3π(20)³ -  4/3π(4)³

<h3>Volume of composite object</h3>

The sphere is a a solid 3-dimensional object. THe formula for calculating its volume is expressed as:

V = 4/3πr³

where:

r is the radius of the sphere

<u>For the outer sphere:</u>

V = 4/3π(20)³

<u>For the inner sphere:</u>

V = 4/3π(4)³

The volume of the shaded part in cubic units is  4/3π(20)³ -  4/3π(4)³

Learn more on volume of sphere here: brainly.com/question/10171109

#SPJ4

6 0
2 years ago
HELP ME DO A STATEMENT REASON FOR THIS PLEASE
Natali [406]

Answer:

Lines are parallel if the sum of external angles of same side is 180°.

Step-by-step explanation:

Let one of the external angle is α°.

and other external angle is β° which is equal to α°/11. (∵ Given on is 11 times smaller than the other.)

Also β° = 1/6 of the right angle = (1/6)×90° = 15°.

β° = α°/11 , ⇒ α° = 11×β° = 11×15° = 165°.

α°+β° = 165° + 15° = 180°.

Here, sum of the two external angles = 180° ⇔ the given lines are parallel.

3 0
4 years ago
What is the slope<br> of the line in this graph?
jasenka [17]
5/7

explanation: (5-0)/(7-0) = 5/7
5 0
3 years ago
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