HELP FAST!!!!!! What percent of 51 is 42? If necessary, round to the nearest tenth of a percent.a)0.8%
b)45.2%
c)121.4%
d)82.4%

Find the percent of decrease from 280 to 210. Round to the nearest tenth of a percent if necessary.

a)133.3%
b)0.3%
c)25%
d)33.3%

Answers

Answer 1

Answer: 42/51 = 14/17
14/17 x 100 = 82.35294
=82.4%

280=100%
210=x%    ( cross multiply)

280X=21000
X=75%

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What is the verbal expression for 15+r

Answers

Answer:

15 is added to r is the answer.

Step-by-step explanation:

Here we can see that one is a number and another is a variable which is named as 'r' here.

When we add a number ( which is called constant ) to a variable

then we write same as we speak

like 15 +r is verbally written as 15 is added to r .

your answer is going to be fifteen plus r

A wooden plank is leaning against an outside wall of a building. The bottom of the plank is 3 ft from the wall. Find each of the following values, and show all your work. (a) Find the approximate length of the plank. Round to the nearest tenth of a foot. (b) Find the height above the ground where the plank touches the wall. Round to the nearest tenth of a foot.

Answers

(A) Find the approximate length of the plank. Round to the nearest tenth of a foot.
Given that the distance of the ground is 3ft.
In order to get the length of the plank,
we can use the this one.

cos 49 = ground / plank
cos 49 = 3 / plank
plank = cos 49 / 3
plank = 0.10 ft

(b) Find the height above the ground where the plank touches the wall. Round to the nearest tenth of a foot.

The remaining angle is equal to
angle = 180 - (90+49)
angle = 41

Finding the height.
tan 41 = height / ground
tan 41 = height / 3
height = tan 41 / 3
height = 0.05 ft.

(A) 0.10 feet
(B) 0.05 feet

What value is equivalent to 13 − 2(1 − 15) ÷ 4?A) -38.5
B) -26
C) 7.25
D) 20

Answers

Answer:

D 20

Step-by-step explanation:

13 − 2(1 − 15) ÷ 4

PEMDAS says parentheses first

13 − 2(-14) ÷ 4

Then multiply and divide from left to right

13 +28 ÷4

13+7

Then add and subtract

Answer:

D. 20

Step-by-step explanation:

Follow PEMDAS

- Hope that helps! Please let me know if you need further explanation.

Which of the following statements is always true of similar polygons?A. Corresponding angles of similar figures have the same measure.

B. The lengths of corresponding sides form equivalent ratios.
C. The lengths of corresponding sides have the same measure.
D. both (a) and (b)

Answers

In this question, there are two correct choices. The corresponding angles of a similar figures have the same measure and the lengths of corresponding sides form equivalent ratios will be the correct choices.

Help!! Math question ASAP!!!!

Answers

Hello,

Answer B

Is y=(5,t) a solution of -5x+y=-40
==>-5*5+t=-40
==>t=-40+15
==>t=-15

Now change the t to y (all is done to make you not to find the answer)
y=-15.

I'll give 100 pts and brainliest if you answer this!!!thank you for the help boo

Perform the operation. Write the answer in standard form.
1. (6 − i) + (9 + 5i)
2. (7 + 3i) + (11 + 2i)
3. (12 + 4i) − (2 − 15i)
4. (3 − 7i) − (3 + 5i)
5. 7 − (2 − 3i) + 6i
6. −16 + (3 + 4i) − 4i
7. 3i(6 − 5i)
8. −2i(8 + 2i)
9. (−5 + i)(8 − 6i)
10. (3 − 6i)(−1 + 7i)
11. (2 + 5i)(2 − 5i)
12. (−3 − i)(−3 + I)
13. (4 + i) 2
14. (5 − 9i) 2
Thank you again <3