5x-8 (4x-7)=2 solve for x

Answers

Answer 1
Answer: 5x - 8(4x - 7) = 2

First, expand your problem. / Your problem should look like: 5x - 32x + 56 = 2
Second, simplify 5x - 32x + 56. / Your problem should look like: -27x + 56 = 2
Third, subtract 56 from both sides. / Your problem should look like: -27x = 2 - 56
Fourth, subtract 2 - 56 to get -54. / Your problem should look like: -27x = -54
Fifth, divide both sides by -27. / Your problem should look like: x =  (-54)/(-27)
Sixth, simplify the fraction to - (54)/(27) / Your problem should look like: x =  (54)/(27)
Seventh, simplify. / Your problem should look like: x = 2

Answer: x = 2


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What is the perimeter and area of the shape?

HELPPP giving 20 points

Answers

Answer:

Perimeter: 90 + 90 + 100 + 100 = 380 ft

Area: 90*90 = 8100 ft.²

Step-by-step explanation:

hope this helps! please give brainliest :)

Find the angle measure that makes the statement true.

Sin 25° = Cos ____ °

Answers

Answer:

          sin 25° = cos 65°

Step-by-step explanation:

We have trigonometric result

                  sin θ = cos (90 -θ)

Here we asked to convert Sin 25°  in to cosine.

So,

          sin 25° = cos (90 -25) = cos 65°

          sin 25° = cos 65°

65. 

You simply have to put cos-1(sin(25))

Evaluate 16/2x8+3^2 A:7 B:10 C:70 D:73

Answers

If you would like to solve 16/2*8 + 3^2, you can do this using the following steps:

16/2*8 + 3^2 = 8*8 + 9 = 64 + 9 = 73

The correct result would be D: 73.

Answer:

It is 73

Step-by-step explanation:

Hope this helped

Jamie had 20 marbles 5 marbles were green and 15 were blue what percent of the marbles were blue?

Answers

Answer:

Step-by-step explanation:

15/20 X 100% = 75%

Therefore 75% of marbles were blue

4. Which cannot describe a system of linear equations?A) no solution
B) exactly two solution
C) infinite solutions
D) exactly one solution

Answers

A system of linear equation can have no solutions , many solutions or exactly one solution .

Let's check out example of each.

No \ Solution\nx+y =2\nx+y=4

Many \ solutionsx+y =2\n2x+2y=4Exactly \  one \  solution\nx+y =2\nx-y=4

So all of these describes a system of  linear equations except two solutions.

So the correct option is B

Final answer:

In a system of linear equations, the lines represented by the equations can either intersect at a single point, don't intersect at all, or coincide entirely. However, they can't intersect at exactly two different points. Hence, the system of linear equations cannot have 'Exactly two solutions'.

Explanation:

In mathematics, specifically in the study of linear equations, there are various possibilities for the number of solutions a system of linear equations can have. These include having no solution (when the lines are parallel and never intersect), exactly one solution (when the lines intersect at one point), or infinite solutions (when the two lines coincide).

Among the provided options, the one that cannot describe a system of linear equations is 'Exactly two solutions'. A system of linear equations cannot have exactly two solutions. It is because the lines representing the equations can either intersect at a single point, don't intersect at all, or coincide, mimicking each other entirely. But it is impossible for them to intersect at exactly two different points.

Learn more about System of Linear Equations here:

brainly.com/question/33609849

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Which of the following equations is of a parabola with a vertex at (0, -3)?y = (x - 3)^2
y = (x + 3)^2
y = x^2 - 3
y = x^2 + 3

Answers

Answer: Third option is correct.

Step-by-step explanation:

Since we have given that

We need a parabola with a vertex at (0,-3)

If we select the equation:

y = x^2 - 3

When we put x = 0, we get

y=0-3\n\ny=-3

And similarly, when we put y = -3, we get

-3=x^2-3\n\n0=x^2\n\nx=0

Hence, third option is correct.

The\ vertx\ form:y=a(x-h)^2+k\nwhere\ the\ coordinates\ of\ vertex\ are\ (h;\ k)\n\n-------------------------\n\nvertex:(0;-3)\n\ny=a(x-0)^2+(-3)=ax^2-3\n\nif\ a=1\ then\ y=x^2-3\leftarrow answer