MATHEMATICS HIGH SCHOOL

What is the value of the expression "eight more than three times the difference of four and a number" when n =3?
□44
□19
□17
□11

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

3 (4 - n) + 8

When n = 3:

3 (4 - 3) + 8

3 (1) + 8

3 + 8

Answer 2

Answer:

Answer:

Step-by-step explanation:

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What do you have to multply 3/8 by to get 1

Solve for x.

A) 10.5
B) 10
C) 6√3
D) 20

Answers

There are three right triangles in this figure. Set up Pythagorean theorem for each of them.
Let y be the altitude of the largest triangle.
Let z be the left side.
We have for large triangle:
x² + z² = (9+3)²
For left sub-triangle:
y² + 3² = z²
For right sub-triangle:
y² + 81 = x²

So the three equations are
x² + z² = 144
y² + 9 = z²
y² + 81 = x²

Solve last equation for y², plug into second equation, solve that for z² in terms of x², and lastly plug z² into the first equation to find
x² + x² - 72 = 144
2x² = 216
x² = 108
x = √108 = √(36·3) = 6√3

The answer is C) 6√3

I need full solution

Answers

Answer:

11= EC

Step-by-step explanation:

EC = 10 + 2 x + 19

= x + 20

So 2 x + 29 - x - 20 = 0

so x + 9 = 0

x = -9.

EC = x + 20 = -9+20 = 11.

Answer:

EC = 11 units

Step-by-step explanation:

first we find the value of x

10 + 2x + 19 = x + 20

2x - x = 20 - 10 - 19

x = -9

--------------------------------

check

10 + 2(-9) + 19 = -9 + 20

10 - 18 + 19 = -9 + 20

11 = 11

same value the answer is good

Now we find EC

EC = 10 + 2x + 19

EC = 10 + 2(-9) + 19 (remember PEMDAS)

EC = 10 - 18 + 19

EC = 11 units

Find area of the triangle 15ft 10ft 10ft

Answers

Answer:

Step-by-step explanation:

i'm going to assume that the base is 10, the formula for a triangle is base x height divided by 1/2 (or 2)

15height x 10base = 150 now divided by 2, 150/2 = 75

What is the length of the line segment that is graphed from (3, 1) to (3, 6)?

Answers

Hello,

The length of the line segment is the distance betheen the 2 points

d²=(3-6)²+(1-6)²=9+25=34 (pythagorean theorem)

d=√34

PLS HELP! DUE IN 10 MINS PLS!!!!!!!!!!!!!!!

Answers

Answer:

25 metres per second

Step-by-step explanation:

just divide 100 by 4 and you will get the answer.☺️☺️

Answer:

25 m/s

Step-by-step explanation:

train a travels at 12.5 m/s and will arrive at 100m in 7s.

train b arrives at the same distance, 100m, in 4s. so that means train b is going at 100m/4s and then simplify that

therefore train b is moving at 25m/s

Athena priced each of her art pieces at the same price and displayed them for sale in two different art shows. She made $495.80 from the first art show and $371.85 from the second show. If Athena sold 7 pieces of art, what price did each piece sell for?

Answers

In the question "Athena priced each of her art pieces at the same price and displayed them for sale in two different art shows. She made $495.80 from the first art show and $371.85 from the second show. If Athena sold 7 pieces of art, what price did each piece sell for?" To get the price that each piece of art sells for: Total sales made from selling 7 pieces of art = $495.80 + $371.85 = $867.65 The price for each piece of art = $867.65 / 7 = $123.95 Thus each piece of art sells for $123.95 and hence the correct answer.

Answer:

$123.95

Step-by-step explanation:

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