21 fewer stars than 3 times a number H

Answers

Answer 1

Answer: You get the expression;
3H-21
Hope this helps.

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(4-3√3)(2-√3)???? (the question marks signal the gap between the question and then me starting to distribute)4(2-√3)-3√3(2-√3)
I get stuck here!! Please help

Answers

You have two binomials. I would just FOIL them:

First:   4 x 2 = 8

Outside: 4 (-√3) = -4√3

Inside:   -3√3 (2) = -6√3

Last:   -3√3 (-√3) = 9

Addummup: 8 - 4√3 - -6√3 + 9 = 17 - 10√3

(4-3√3)(2-√3)
(4 - 3√3)(2 - √3) -> 4 x 2 = 8
(4 - 3√3)(2 - √3) -> -3√3 x 2 = -6√3
(4 - 3√3)(2 - √3) -> 4 x -√3 = -4√3
(4 - 3√3)(2 - √3) -> -3√3 x -√3 = 3√3 x √3 = √9√3 x √3 = √27 x √3 = √81 = 9

∴ (4-3√3)(2-√3) = 8 - 6√3 - 4√3 + 9

8 - 6√3 - 4√3 + 9
= 17 - 6√3 - 4√3
= 17 + (- 6 - 4)√3
= 17 - 10√3

Without decimals, you cannot go any further.
Tell me if I was confusing at all :)

UPDATED... AGAIN...

The surface area of a square pyramid is 136 square inches. The base length is 4 inches. What is the slant height? please help!

Answers

the surface area is 136

you need to subtract the surface area of the base. It is a square pyramid, so both the sides are 4 inches, meaning you need to multiply 4x4 which is 16 and subtract it from the rest of the area. 136-16=120

There are four identical triangles that have identical surface area because it is a square triangle. So you can divide 120 by four to get the area of one of the triangles. 120/4=30

the formula for the area of a triangle is 1/2 base x height. We know that the base is 4 because that is the length that was given to us. so we can plug in our numbers into the formula

30=1/2(4)(height)

30=2(height)

and from there we can solve. 30/2=15

the height of the triangle is 15, which is also the slant height

to check our work, 1/2(4)(15)=30

4x15=60

1/2x60=30

PLEASE HELP PLS HELP MEEEE

Answers

Answer:35%

Step-by-step explanation:

7/20 is .35. Thus what percent is 7 to 20? 35 percent

Answer:

35% is the correct answer. hope this helped. if not let me know, and i will make it up to you.

Cesar bought 2 bottles of juice that each hold 2 quarts and another bottle that holds 1 1/2 gallons of juice how many quarts of juice did he buy

Answers

10 quarts, because 2 x 2 = 4 quarts, then 1 gallon = 4 quarts, 4 + 4 = 8, then half of 4 is 2, which 8 + 2 = 10.

There are 4 quarts in a gallon, so there are 6 quarts in 1 1/2 gallons, so you have a total of 8 quarts of juice.

There are 50 questions to answer in a trivia contest. Each player starts with 100 points. He or she earns 10 points for each correct answer but loses 4 points with each incorrect answer. Each player must answer all 50 questions. What is the fewest number of questions a contestant must answer to get a score over 350?I just need to know how to set it up?

Answers

first take off 100, then what x 10 = 250? that is your answer. (25)

In how many ways can 3 cards from a deck of 52 cards can be laid in a row face up?

Answers

ok slot method
3 slots
1st slot has 52 options
2nd slot has 51 optoins (1 went to first slot)
3rd slot has 50 options (1 went to previous slot)

number of ways=52*51*50=132600 ways

6 ways cause you can out them in a different row

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