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QveST [7]
4 years ago
7

Select ALL the correct anwsers.

Mathematics
2 answers:
lesantik [10]4 years ago
8 0

Answer:

Equation B, C and E have solution x = 3.

Step-by-step explanation:

We are given the following equations in the question:

1)

\displaystyle\frac{1}{2}x - 4 = 2\\\\\Rightarrow \frac{1}{2}x = 6\\\\\Rightarrow x = 12

2)

0.4x - 0.8(x - 4) = 1.3x - 1.9\\\Rightarrow 0.4x-0.8x+3.2 = 1.3 x -1.9\\\Rightarrow -0.4x + 3.2 = 1.3x - 1.9\\\Rightarrow1.7x = 5.1\\\Rightarrow x = 3

3)

\displaystyle\frac{1}{4}x + 7 = \frac{31}{4}\\\\\Rightarrow \frac{1}{4}x  = \frac{31-28}{4} = \frac{3}{4}\\\\\Rightarrow x =3

4)

x - 2(x + 4) = x + 2\\\Rightarrow x - 2x-8=x+2\\\Rightarrow -x-8=x+2\\\Rightarrow 2x = -10\\\Rightarrow x = -5

5)

3(x + 4) - x = 18\\\Rightarrow 3x +12-x = 18\\\Rightarrow 3x-x = 6\\\\\Rightarrow x = \displaystyle\frac{6}{2} = 3

Equation B, C and E have solution x = 3.

Lostsunrise [7]4 years ago
3 0

The answer is B,C,and E


THIS IS RIGHT!!!

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Please help me with this
hodyreva [135]

Answer:

1.) The quotient of a number and 2 = x ÷ 2

2.) A number decreased by 2 = x - 2

3.) 2 times a number = 2x

4.) 2 increased by a number = 2 + x

Step-by-step explanation:

Let's look for key words hidden in these sentences:

1.) The <u>quotient</u> of a number and 2 = The word quotient refers to division

2.) A number <u>decreased</u> by 2 = The word decreased refers to subtraction

3.) 2 <u>times</u> a number = the word times refers to multiplication

4.) 2 <u>increased</u> by a number = the word increased refers to addition

Hope this helps!

5 0
3 years ago
Estimate the tax on shoes that cost $68.50 when the sales tax rate is 8.25%.
Bond [772]
It would cost $74.15 for the shoes
8 0
4 years ago
Find - square root 36<br> A.+6<br> B.-6<br> C.6<br> D.18<br> Help the I
Lisa [10]

Answer:

A.

Step-by-step explanation:

7 0
3 years ago
A group of friends wants to go to the amusement park. They have no more than $275
Zanzabum

Answer:

10 persons

Step-by-step explanation:

Step one:

given data

We are told that they have a total of $275

also, they want to spend $5 on packing space

and a ticket cost $27 per person.

Step two:

let the number of persons be x

and let the total amount to be spent be y

hence the inequality is

y≤ 5+ 27x

now for y= $275, let us find x

Substitute into the inequality we have

275≤5+27x

275-5≤27x

270≤27x

Divide both sides by 27

x ≤ 270/27

x ≤ 10

Hence the number of persons should not be more than 10

6 0
3 years ago
Read 2 more answers
KAitlin is on a long car trip.Every time she’s stops to buy gas,she loses 15 minutes of travel time.If she has to stop 5 times ,
OLga [1]

Answer:

Kaitlin will be 1 hour and 15 minutes late (75 minutes)

15 · 5 = <u>75</u>

6 0
4 years ago
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