MATHEMATICS HIGH SCHOOL

What is the value of the
expression below when x = 4
x² + 3x - 6

Answers

Answer 1
Answer: 22 is the answer to x2 + 3x -6

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Simplify the question
10x /(divide) -2y

Answers

Answer:

-5x/y is the answer

Step-by-step explanation:

10x/-2y

Dividing by 2

=5x/-y

=-5x/y

I hope this will help you :)

Answer:

(-5x)/y

Step-by-step explanation:

I'm assuming you meant:

  10x

---------

 -2y

                               -5x

This reduces to   ----------

                                  y

Mario bought $5 worth of stamps at the post office. He bought ten more 6-cent stamps than 10-cent stamps. The number of 8-cent stamps was three times the number of 10-cent stamps. He also bought two 20-cent stamps. How many of each kind of stamp did he purchase?

Answers

He bought 2 20-cent stamps.
That is $0.40.
He spent $4.60 on the other stamps.

He bought x 6-cent stamps, y 10-cent stamps, and z 8-cent stamps.

y + 10 = x
z = 3y

6x + 10y + 8z = 460

6(y + 10) + 10y + 8(3y) = 460

6y + 60 + 10y + 24y = 460

40y + 60 = 460

40y = 400

y = 10

x = y + 10 = 10 + 10 = 20

z = 3y = 3(10) = 30

He bought
20 6-cent stamps
10 10-cent stamps
30 8-cent stamps
2 20-cent stamps

If A and B are complementary angles and A = (8x+20), B = (7x-5) find A

Answers

Answer:

m∠A = 60°

Step-by-step explanation:

Complementary Angles add up to 90°

Step 1: Set up equation

8x + 20 + 7x - 5 = 90

Step 2: Solve for x

15x + 15 = 90

15x = 75

x = 5

Step 3: Find m∠A

m∠A = 8x + 20

m∠A = 8(5) + 20

m∠A = 40 + 20

m∠A = 60°

D
What is a decimal that is equivalent to the fraction 50/100
?

Answers

Answer:

0.5

Step-by-step explanation:

What exactly do I do...

Answers

Answer:

Step-by-step explanation:

So first you want to number your graph

The first number you want to graph is the first one on the x line, If you numbered in ones it should be 4 to the left from the center

Next graph the 2nd number on the y line, draw a line and connect the -4 and the 7

Answer:

7.9 units

Step-by-step explanation:

You are required to find the distance between the points P and Q whose coordinates are given:

P (0, 0), Q(-4, 7)

QP= \sqrt{ {( - 4 - 0)}^(2) + ( {7 - 0})^(2) } \n \n = \sqrt{( - 4) ^(2) + {(7)}^(2) } \n \n = √(16 + 49) \n \n = √(63) \n \n = 7.93725393 \n \n = 7.9 \: units

What two numbers add to equal -12 and multiply to equal -28?

Answers

One thing before we start :)

AS you can see both numbers after equation have to be negative, 
also we know that 2 same numbers have to add up to -12 and those 2 number after multiplication have to be equal -28

Some theory:

We know that any number which is not negative multiplied by negative will result in negative result, to make it more clear 

(+)*(-)=(-)

but

(-)*(-)=(+)

we have 2 unknown numbers, let's say it's x and y

x+y=-12
x*y=-28

for x=2
for y=-14

2+(-14)=2-14=-12
(2)*(-14)=-28

So your answer is 2 and -14 ;)
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