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1 year ago

(-3x2 + x + 5) − (4x2 − 2x)

Mathematics

2 answers:

Tasya [4]1 year ago

7 0

Answer:

-7x^2 + 3x + 5

Step-by-step explanation:

-3x^2 + x + 5 - 4x^2 + 2x

nydimaria [60]1 year ago

7 0

(-6+x+5)-(8-2x)
-1+x-8+2x
-9 + 3x
If 3x-9=0
Then x =3

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Kierston needs to paint a wall of the youth center. She knows that 1 can of paint covers an area of 2.2 square meters. Kierston

Step2247 [10]

Answer:

See Explanation

Step-by-step explanation:

Given

$1\ can = 2.2m^2$

Required

Determine the number of cans for the wall

The dimension of the wall is not given. So, I will use the following assumed values:

$Length=20m$

$Width = 44m$

First, calculate the area of the wall

$Area = Length * Width$

$Area = 20m * 44m$

$Area = 880m^2$

If $1\ can = 2.2m^2$

Then $x = 880m^2$

Cross Multiply:

$x * 2.2m^2 = 1 * 880m^2$

$x * 2.2m^2 = 880m^2$

$x * 2.2 = 880$

Make x the subject

$x = \frac{880}{2.2}$

$x = 400$

400 cans using the assume dimensions.

So, all you need to to is, get the original values and follow the same steps

4 0

2 years ago

Solve for x. M=5/dx+e

snow_lady [41]

After solving $M=\frac{5}{dx}+e$ we get value of x: $x=\frac{5}{(M-e)d}$

Step-by-step explanation:

We need to solve the equation $M=\frac{5}{dx}+e$ to find value of x

Solving

$M=\frac{5}{dx}+e$

Adding -e on both sides

$M-e=\frac{5}{dx}+e-e$

$M-e=\frac{5}{dx}$

Multiply both sides by dx

$dx(M-e)=5$

Divide both sides by M-e

$dx=\frac{5}{M-e}$

Divide both sides by d

$x=\frac{5}{(M-e)d}$

So, After solving $M=\frac{5}{dx}+e$ we get value of x: $x=\frac{5}{(M-e)d}$

Keywords: Solving Equations

Learn more about Solving Equations at:

#learnwithBrainly

8 0

3 years ago

IN (3)

svetoff [14.1K]

Answer:

(a) Rule: Multiply the input (x) by 2 and add 5 to the result of the product

(b) $y =2x +5$

Step-by-step explanation:

Given

The attached table

Solving (a): The rule of the table in words

First, we calculate the slope (m)

$m = \frac{y_2 - y_1}{x_2 - x_1}$

Using:

$(x_1,y_1) = (2,9)$

$(x_1,y_1) = (10,25)$

So, we have:

$m = \frac{25 - 9}{10 - 2}$

$m = \frac{16}{8}$

$m=2$

The equation is calculated using:

$y - y_1 =m(x - x_1)$

Using:

$(x_1,y_1) = (6,17)$

We have:

$y - 17 =2(x - 6)$

$y - 17 =2x - 12$

Make y the subject

$y =2x - 12+17$

$y =2x +5$

Hence, the rule is:

Multiply the input (x) by 2 and add 5 to the result of the product

(b): The rule, in algebra

As solved in (a), the rule is:

$y =2x +5$

8 0

2 years ago

Determine which equation is false, based on the solution set S:{3}.

Alborosie

Answer:

4m+5=12

Step-by-step explanation:

4(3)+5#12

right hand side is not equal to left hand side

7 0

1 year ago

Read 2 more answers

A company policy requires that for every 30 employees, there must be 3 supervisors. If there are 267 supervisors at the company,

Alexus [3.1K]

267 supervisors will have 2670 employees.

Step-by-step explanation:

Let x be the number of employees.

Given,

3 supervisors = 30 employees

1 supervisor = $\frac{30}{3}$

1 supervisor = 10 employees

As one supervisor has 10 employees, 267 supervisors will have;

x = 267*10

x= 2670 employees

267 supervisors will have 2670 employees.

Keywords: Multiplication.

Learn more about multiplication at:

#LearnwithBrainly

4 0

3 years ago