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Taya2010 [7]
4 years ago
15

What is 2×(-5)-(-8)=A. 79B.-80C.80D.83what is the answer?

Mathematics
1 answer:
saul85 [17]4 years ago
6 0
The answer is -2 when you simplify
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Tyler has $9.70 in dimes and quarters. The number of quarters is eight more than four times the number of dimes. How many of eac
julia-pushkina [17]

Tyler has 7 dimes and 36 quarters.

<u><em>Explanation</em></u>

Suppose, the number of dimes is x

As the number of quarters is eight more than four times the number of dimes, so the number of quarters =4x+8

Value of one dime is $0.10 and value of one quarter is $0.25

Given that, total value of all dimes and quarters is $9.70

So, the equation will be....

0.10x+0.25(4x+8)=9.70\\ \\ 0.10x+1x+2=9.70\\ \\ 1.10x+2=9.70\\ \\ 1.10x= 9.70-2\\ \\ 1.10x=7.70\\ \\ x=\frac{7.70}{1.10}=7

So, the number of dimes is 7 and the number of quarters =4(7)+8=28+8=36

3 0
3 years ago
Which of the following inequalities matches the graph? graph of an inequality with a solid line through the points (0, −2) and (
Ne4ueva [31]

Answer:

The correct option is 3.

Step-by-step explanation:

It is given that graph of an inequality with a solid line through the points (0, −2) and (2, 1) with shading above the line.

The equation of solid line is

y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)

y+2=\frac{1+2}{2-0}(x-0)

y+2=\frac{3}{2}x

The y-intercept of the line is -2 and the shaded region is shading above the line. So, (0,0) must be lies in the shaded region.

Check the related equation by point (0,0).

0+2=\frac{3}{2}(0)

2=0

The statement is true if and only if the sign is greater than or equal instead of equal.

The required inequality is

y+2\geq \frac{3}{2}x

Multiply both sides by 2.

2y+4\geq 3x

4\geq 3x-2y

3x-2y\leq 4

Therefore option 3 is correct.

3 0
3 years ago
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Bruno bought a PSS for $800. If the store charges 160% of its cost for the game system, how much is the store's profit?
adoni [48]

Answer:

$480

Step-by-step explanation:

160% of 800 is 1,280; then deduct 800 from that

7 0
3 years ago
Which number on the number line is exactly halfway between 9/10 and 11/12
MakcuM [25]

Answer:

2/2

Step-by-step explanation:

because take it away

6 0
4 years ago
The distribution of reading scale scores in the 4th grade at Truman Elementary School was approximately normal with mean = 221 a
liraira [26]

Answer:

221

Step-by-step explanation:

3 0
3 years ago
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