All categories

3 years ago

-7=21+x help please thankyou

Mathematics

2 answers:

serg [7]3 years ago

4 0

Move the 21 to the other side and change the sign

-7-21=x
x=-28

hope this helps

Readme [11.4K]3 years ago

4 0

Subtract 21 on both sides.

-7-21=21-21+x
-7-21=x
x=-28

You might be interested in

With respect to conducting a situation analysis, what does the phrase "Analysis alone is not a solution" mean?

nikklg [1K]

Answer: Analysis alone is not sufficient because a relationship should be made between a persons instinct and his judgement of matters to arrive at a useful conclusion.

Step-by-step explanation:

While it is necessary to conduct a situation analysis, it is also important to note that a situation analysis on its own is not enough because there should be a relationship drawn between good judgment and instinct so as to make the outcome of the analysis relevant when making important decisions.

For a situation analysis to be effective, information must be broken down sufficiently into bits so as to have a proper understanding as to why organizations, customers, and individuals behave or work the way they do. After these things are thoroughly understood, then the decision maker can make a more effective decision.

4 0

4 years ago

This shape has been made from two identical triangles

uysha [10]

Answer:

square or rectangle

Step-by-step explanation:

3 0

3 years ago

Please Help!!! I am totally lost!<br><br> Solve for x and find mangleABC.

kupik [55]

When something bisects an angle, it cuts that angle in half. This means that ray BD cuts angle ABC in half. Therefore, angle ABD, which is formed by cutting the angle in half, is equal to angle CBD, which is also formed by cutting the angle in half. Because of this, you have to set the equation equal to each other.

9x-18=5x+2

Combine like terms. Add 18 to both sides.

9x=5x+20

Combine like terms. Subtract 5x from both sides.

4x=20

Divide 4 on both sides.

x=5 degrees

3 0

3 years ago

This figure is made up of a rectangle and parallelogram.

ivann1987 [24]

The area of the figure is 40 units. (rounded off from 39.998 units)

Step-by-step explanation:

1. Area of the figure = Area of Rectangle + Area of Parallelogram.

2. Naming points:

Let the rectangle consist of points A(-6,-1), B(-5,-5), C(3,-3) and D(2,1).

Let the parallelogram consist of points C(3,-3), D(2,1), E(2,7) and F(3,3).

3. Each coordinate has a point on the x-axis and a point on the y-axis. We shall refer to these points as x', x'' ,x''' and so on corresponding to the x-axis values of A, B, C and so on in that order till F. For the y-axis points, we will name them in the series of y', y'', y''' and so on.

In simple words, in A(-6,1), x' = -6; y' = -1

4. Formula for finding area:

Area of a rectangle = length (l) × width (w)

Area of a parallelogram = base (b) x height (h)

5. Finding area of the rectangle:

l = AD = $\sqrt{[x'''' - x']^{2} - [y'''' - y']^{2}}$

, i.e. AD = $\sqrt{[2 - (-6)]^{2} - [1 - (-1)]^{2}}$

, i.e. AD = √68 = 8.246 (rounded to 3 decimals) = l

Now, w = AB = $\sqrt{[x'' - x']^{2} - [y'' - y']^{2}}$

, i.e. AB = $\sqrt{[(-5) - (-6)]^{2} - [(-5) - (-1)]^{2}}$

, i.e. AB = √17 = 4.123 (rounded to 3 decimals) = w

Area of rectangle = l x w = 8.246 x 4.123 = 33.998 units.

6. Finding area of the parallelogram:

b = DE = 6 units (we can observe this from the graph, i.e. points from 1 to 7 on the y axis)

h = Height is the line drawn perpendicular to the base from point F, which as we can see is 1 unit long.

Hence, Area of parallelogram = b x h = 6 x 1 = 6 units.

7. Now, adding both, we can arrive at the final answer.

Area of the figure = Area of rectangle + Area of parallelogram,

i.e. 33.998 units + 6 units = 39.998 units. (can be rounded off to 40 units)

4 0

3 years ago

A text message plan costs $9 per month plus $0.39 per text. Find the monthly cost for x text message The monthly cost of x messa

Sergio039 [100]

Answer:

The monthly cost = $9 + $0.39x

Step-by-step explanation:

4 0

2 years ago