MATHEMATICS HIGH SCHOOL

a student's work to distribute and simplify a radical is shown below. Select the statement which best applies to the sample mathematical work. given (-5√20+√3)*(2+√3), i first distribute to get the expression -10√20-5√60+2√3+√9, which i can simplify to -40√5-20√15+2√3+3 for an answer. a. the student did not properly distribute the radicals b. the student overlooked combining one or more of the radical terms c. the student did not properly simplify all radicals d. the work shown above is correct

Answers

Answer 1
Answer:

Answer:

Step-by-step explanation:

Given that a student's work to distribute and simplify a radical is shown below.

Given

(-5√20+√3)*(2+√3)

The next step of distribution is

-5√60+2√3+√9 is done correctly.

Next step is

-40√5-20√15+2√3+3

I term = -10√20=-20√5

Correct answer is

Hence c) the student did not properly simplify all radicals
Answer 2
Answer: C), radicals siplified incorrectly

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What is 3 3/2 equal to ? A . 3 sqrt 9 B . 2 sqrt 9 C.3 sqrt 27 D. 2 sqrt 27

$39 pizza order 15%tip

Answers

Answer=44.85$
If your asking how much the total would be...

39$*1.15=44.85$

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
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(A) 0.10 feet
(B) 0.05 feet

Which is bigger 8/10 or 79/100

Answers

To figure this out first we will convert each fraction in to a decimal. To do this we need to divide the numerator by the denominator. 

8/10 = 8 ÷ 10 = 0.80

79/100 = 79 ÷ 100 = 0.79

So, 8/10 = 0.80 & 79/100 = 0.79.

Since 0.80 is more than 0.79 8/10 is bigger.

So 8/10 (0.80) is bigger than 79/100 (0.79). 

Hope I helped ya!! :) 
you can say 8/10 = 80/100 ⇒ 80/100 is bigger than 79/100 :)))

Select the expression that represents the following statement: multiply 6 by 2, and then subtract 4. 1- 2 − 4 x 6
2- 6 x 2 − 4
3- 6 + 6 + 4 − 2
4- 6 x 4 − 2

Answers

Answer: 2. 6 X 2 -4

Step-by-step explanation:

Only 2 fits the descriptions, where 6 is multiply 2, 6 x 2. And we subtract 4 from it, 6 x 2 -4.

What fraction of a pound is forty pence?

Answers

\pounds1=100p\n\n 40p=\pounds(40)/(100)=\pounds0.4

Which of the following is an equivalent form of the compound inequality -22 > -5x - 7 ≥ -3? -5x - 7 < -22 and -5x - 7 ≥ -3

-5x - 7 > -22 and -5x - 7 ≥ -3

-5x > -22 and -7 ≥ -3

-5x - 7 < -22 and -5x - 7 ≤-3

Answers

-22 > -5x - 7 ≥ -3
-5x - 7 < -22 and -5x - 7 ≥ -3

Answer:

The Answer is D. −5x − 7 < −22 and −5x − 7 ≤ −3

Hope This Helps!
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