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posledela
3 years ago
10

If 4x = 28 then x = 7

Mathematics
2 answers:
Hoochie [10]3 years ago
8 0
4x = 28
4(7) = 28
28 = 28
Therefore x is 7.
Contact [7]3 years ago
6 0

Answer:

correct

Step-by-step explanation:

4 times 7 is 28

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Your building plan for your restaurant includes one men's and women's restroom. The city inspector lets you kno that you must ha
Ivanshal [37]

Answer: 3200 ft^2

Step-by-step explanation:

You have a total area of 4,000 ft^2.

In your plan, you will make two bathrooms (one men's restroom and one women's restroom)

We know that each one of them needs 400ft^2, then the total area needed is two times 400ft^2, or:

2*400ft^2 = 800ft^2

If we subtract this to the total area, we get:

4000ft^2 - 800ft^2 = 3200 ft^2

That is the square feet left for the development of other nonbathroom areas.

6 0
3 years ago
WILL MARK BRAINLIEST AND THANK YOU!!! PLEASE HELP!!
Nadya [2.5K]

Answer:

426.9 Km²

Step-by-step explanation:

The shaded area is the area of the triangle subtract the area of the circle.

Area of triangle = 0.5 bh ( b is the base and h the perpendicular height )

Here b = 40 and h = 27, thus

Area = 0.5 × 40 × 27 = 20 × 27 = 540 Km²

Area of circle = πr² ← r is the radius

Here the diameter is 12, thus radius = 12 ÷ 2 = 6

Area = π × 6² = 36π ≈ 113.1 Km²

Shaded area = 540 - 113.1 = 426.9 Km²

6 0
3 years ago
What is the equation of the directrix of the parabola given by the equation y2 = -24x?
valentina_108 [34]

Hello!

The directrix of a parabola is a fixed line used in describing a curve or surface.

The standard form a parabola is 4p(x - h) = (y - k)². In this equation, h, k is the vertex, and p is the focal point.

To find the standard form, first, we would find p.

Since the equation given, y² = -24x, has a vertex at (0, 0), h, k would be zero. In this case, we can find p now.

4p = -24 (divide both sides by 4)

p = -6

4(-6)(x - 0) = (y - 0)² which can be simplified to: 4(-6)(x) = y².

Looking at the graph of the parabola, it is symmetric around the x-axis, so therefore, the directrix is a line parallel to the y-axis. To find the directrix, use the formula: x = 0 - p, and we know that p = -6.

x = 0 - (-6)

x = 6

Therefore, the directrix of the parabola is choice D, x = 6.

3 0
4 years ago
Choose the graph that represents the following system of inequalities:
Licemer1 [7]

Answer:

FIRST.

64 square inches matches to a cross section parallel to the base of a right rectangle prism that is 3 inches long, 7 inches wide, and 11 inches tall

This is shown in the first figure below. A right rectangular prism where every edge connecting its base and the opposite face makes right angles with both faces. Since the tall is the side that measures 11 inches, then the base is formed by 3 inches long and 7 inches wide. Therefore, the area of this shape can be found as the area of a rectangle, which is: 21 in squared.

SECOND.

64 square inches matches to a cross section parallel to the base of a cube whose edges are 8 inches long.

This is shown in the second figure below. A cube is a prism whose sides all have the same length and in this case is 8 inches. We name cross section is to the slice that cuts through a solid. If the cross section is parallel to the base of a cube, then it forms a square with length . Therefore, the area of this shape can be found as the area of a square, which is: 64 in squared.

Third.

7 square inches matches to a cross section passing through the diagonal of opposite faces of a cube with edges that are 7 inches long and a diagonal that is approximately 10 inches

This is shown in the third figure below. As you can see, the cross section passes through the diagonals of the base and the top of the cube that are two opposite faces. This form a rectangle having sides  where:

So: 70 in squared

FOURTH.

300 square inches matches to a cross section perpendicular to the base and passing through the diagonals of the base and opposite face of a right rectangular prism that is 24 inches wide, 7 inches long, and 12 inches tall and measures 25 inches along the diagonal of the base.

This is shown in the fourth figure below. The cross section passes through the diagonals of the base and the top of the right rectangular prism. They are opposite to each other, so the shape of the cross section is a rectangle whose sides are  where:

So: 300 in squared.

Step-by-step explanation:

6 0
3 years ago
company A charges $110 for the truck and $55 per hour for the movers company B charges $100 for the truck and $ 60 per hour for
mezya [45]
Company A:
110+55x=y

Company B:
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