3 years ago

Plssssss helpppppppp

Mathematics

1 answer:

Sever21 [200]3 years ago

3 0

Answer:

x = -2.5

Step-by-step explanation:

→ Multiply both sides of the equation by the opposing denominator

8x = -20

→ Divide both sides by 8 to isolate x

x = $-\frac{20}{8} =-\frac{10}{4} =-\frac{5}{2}$ or -2.5

You might be interested in

Solve the equation. 1. -66 = -9n+ 16 + 4 n = 4 b. n = 10

prisoha [69]

Answer:

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Data on the blood cholesterol levels of 6 rats give mean = 85, s= 12. A 95% confidence interval for the mean blood cholesterol o

lana [24]

The correct answer is:

c)75.4 to 94.6

Explanation:

The formula for a confidence interval is:

$\mu \pm z*(\frac{\sigma}{\sqrt{n}})$ ,

where μ is the mean, z is the z-score associated with the level of confidence we want, σ is the standard deviation, and n is the sample size.

Our mean is 85, our standard deviation is 12, our sample size is 6, and since we want 95% confidence, our z-score is 1.96:

$85\pm 1.96(\frac{12}{\sqrt{6}})=85\pm 9.6=85-9.6, 85+9.6=75.4, 94.6$

4 0

3 years ago

Read 2 more answers

Calculate the rate of change.

Tpy6a [65]

Answer:

Step-by-step explanation:

Rise is 10 run is 5 Rate of Change is rise over run.

7 0

3 years ago

The equation of line p is y=ax+b. Which of these could be the equation of line q? A.y=−3a(x+6)+b

Ilia_Sergeevich [38]

The slope of line q is that of line p scaled by a factor of 3 (not -3). The y-intercept of line q is 6 less than the y-intercept of line p. The appropriate choice is
D. y = 3ax +b -6

7 0

3 years ago

Read 2 more answers

Work out the area of a rectangle with base, b = 34mm and perimeter, P = 86mm.

Nana76 [90]

Answer:

306mm²

Step-by-step explanation:

the height h = 86/2 -34 = 43-34=9mm

the area = 34×9= 306mm²

8 0

3 years ago

Read 2 more answers