Four expressions are shown:5(4x + 3)
20x + 15
5(5x + 2)
25x + 10
Which two expressions are equivalent to 5(4x + 2 + x)?
C and D
A and C
A and B
A and D

Answers

Answer 1

Answer: C and D is the correct answer.

Answer 2

Answer: C and D are equivalent

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When Derek planted a tree it was 36 inches tall. The tree grew 1 1/4 inches per year. The tree is now 44 3/4 inches tall. How many years ago did Derek plant the tree?

Answers

Original Height = 36 inches.

Change in height:

$44(3)/(4) - 36 = 8(3)/(4)$

Number of years :

$8(3)/(4) / 1(1)/(4)$

$=(35)/(4) / (5)/(4)$

$=(35)/(4) * (4)/(5)$

$=7$

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Answer; Derek has planted the tree for 7 years.
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only 6 of the 75 trees in the park are at leat 30 feet tall. what percent of the trees are over 30 feet?

Answers

Answer:

8 %

Step-by-step explanation:

To find the percent of trees that are over 30 ft tall, take the number of trees that are over 30 ft tall over the number of tree

Percent = trees over 30 ft tall/ total number of trees

= 6/75

=.08

Change this to a percent by multiply by 100%

.08 * 100%

8 %

.......................................................

Answers

For this problem, we only need the first term of the sequence to solve.

The first term of the sequence is represented by n = 1. Plug this into the equation:

$-2 * 2^(1-1)$
$-2 * 2^(0) = -2 * 1 = -2$

The only answer choice that has this result for their first term is -2; -16; -256.

a stained glass window is shaped like a semicircle. the bottom edge of the window is 36inches long. what is the area of the stained glass window? round your answer to the nearest hundreth

Answers

The formula for the area of a semicircle is equivalent to the area if it were a circle divided by 2. Since the bottom edge of the window is 36 inches long, this means that its diameter is also 36 inches long. This gives an area of 508.94 square inches.

The solution is:

A = Acircle/2 = pi*r^2/2 = pi*(18)^2/2 = 508.94 in^2

The teacher kept track of how long it took students to finish a test. After 20 minutes, 3 students had finished the test. How long did it take until 8 students were finished?

A.
10 minutes

B.
50 minutes

C.
60 minutes

D.
80 minutes

Answers

so if they all took the same rate then
20 minutes=3 students
divideb y 3
6 1/6 min=1 student
multply by 8
48 and 8/6=8 student=49 and 2/6=49 and 1/3 min=49 min and 20 seconds

the answer is B 50 minutes

reason abstractly: the formula F= 1.8C+32 allows you to find the Fahrenheit (F) temperature for a given Celsius (C) temperature. Solve the equation for C to produce a formula for finding the Celsius temperature for a given Fahrenheit temperature