MATHEMATICS HIGH SCHOOL

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) Step 1: 12 + (–3)·(–2x) + (–3)·(4)
Step 2: 12 + 6x + (–12)
Step 3: 12 + (–12) + 6x
Step 4: 0 + 6x Step 5: 6x

What property of real numbers was used to transition from Step 3 to Step 4?
A. identity property of addition
B. inverse property of addition
C. associative property of addition
D. commutative property of addition

Answers

Answer 1
Answer: inverse property of addition
Answer 2
Answer: B: inverse property of addition

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Solve for x: 2x^2+4x-16+=0
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Ryan buys a 2 kilogram bag of trail mix for a hike. He wants to make 5- ounce bags to share with his hiking friends. There are approximately 35 ounces in 1 kilograms. How many 5- ounces bags can Ryan make

Multiply and simplify:(2x + 8)
A)
2x2 +64
B)
4x? + 64
C)
4x2 + 32x + 64
D)
4x2 + 16x + 16

Answers

Answer:

A. 2x+8

Step-by-step explanation:

you take the two and multiply it to the X and the eight and that would give you 2X2 + 64
What is the outside number

A large water tank holds 210 liters of water. About how many gallons of water does the same tank hold, if there are approximately 15 liters in 4 gallons?

Answers

Answer:

56

Step-by-step explanation:

210 divided by 15 to get how many sets of 15 in the tank which is 14, then multiply 14 by 4 to get the gallon equivalent.

There are 77 students in the student council. The ratio of girls to boys is 7:4. How many girls are in the student council?

Answers

77 students
G : B
7 : 4

11 units (7+4) = 77
1 unit = 7

7 units = 49

so there are 49 girls in the student council

hope this helped :)

Solve for x.
5x - 6 = 4x + 8

Answers

5x - 6 = 4x + 8
-4x        -4x

x - 6 = 8
    +6   +6

x = 14

Answer: x = 14
First let's get X to one side by subtracting 4x from both sides. (5x-4x) -6 = 8. x-6=8. Now we add 6 to both sides to isolate "x". x=8+6=14. Our answer is x=14.

If one angle of a rhombus is 35 What are the remaining three angles

Answers

angle across from the each other is equivalent then
So one of the other angles is 35

35+35=70 

360 degrees in a Rhombus 

360 - 70 = 290 
290 / 2=145 

The remaining angles are 35, 145, 145
the rhombus of the rest of the 3 is 105

In a survey of market, it is found that 143 persons use white toothpaste and 135 use red toothpaste. If 70 of them use both the toothpaste then find the number of persons who use at least one of the toothpaste​

Answers

Answer:

let W and R represent white toothpaste and red toothpaste represently

n(W)=143

n(R)=135

n(WnR)=70

n( WuR)=?

Now,

n(WuR)=n(W)+n(R)_n(WnR)

=143+135_70

=208

that's all don't forget to write therefore.
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