2 years ago

-3 - 3x = -4(2x + 7)

Mathematics

1 answer:

Marizza181 [45]2 years ago

5 0

Answer : x=−5

Step-by-step explanation: Step 1: Simplify both sides of the equation.

−3−3x=−4(2x+7)

−3+−3x=(−4)(2x)+(−4)(7)(Distribute)

−3+−3x=−8x+−28

−3x−3=−8x−28

Step 2: Add 8x to both sides.

−3x−3+8x=−8x−28+8x

5x−3=−28

Step 3: Add 3 to both sides.

5x−3+3=−28+3

5x=−25

Step 4: Divide both sides by 5.

5x /5 = −25 /5

x=−5

Answer:

x=−5

You might be interested in

A teacher claims that the proportion of students expected to pass an exam is greater than 80%. To test this claim, the teacher a

erica [24]

Answer:

z=-1.591

Step-by-step explanation:

Null Hypotheses,

$H_0 : p=0.8\\H_a: p>0.80$

So we use z-test for one population proportion (right-tailed test)

According to this informaton, we defined that

$\alpha=0.05$

$z_c=1.64$ (critical value)

So our Rejection region is $R={z:z>1.64}$

$z=\frac{\bar{p}-p_0}{\sqrt{p_0(1-p_0)/n}} = \frac{0.755-0.8}{\sqrt{0.8(1-0.8)/200}}=-1.591$

Not rejection.

6 0

2 years ago

7y^2+15x-22. Y=4. ×=5

Nutka1998 [239]

let's plug the value of x and y as 5 and 4 respectively to find the value of given expression :

$7 {y}^{2} + 15x - 22$

$7(4) {}^{2} + (15 \times 5) - 22$

$(7 \times 16) + 75 - 22$

$112 + 53$

$165$

3 0

2 years ago

Superman needs to save Lois. After flying for 10 seconds he is 1520 meters from her then at 15 seconds he is 1230 meters from he

Sunny_sXe [5.5K]

Average speed is 58 meters per second

8 0

2 years ago

F(x)= x2 + 5x at x = 4<br><br>

Viktor [21]

Answer:

x)x+5x

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Peter uses unit cubes to build a figure in the shape of the letter X what is the fewest unit cubes that Peter can use to build t

lozanna [386]

I am not sure I am right but I think it depends on the size of the X.

4 0

2 years ago