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Juli2301 [7.4K]
3 years ago
8

What is the surface area, old helllp ​

Mathematics
1 answer:
alisha [4.7K]3 years ago
3 0

Answer:

480 cm

Step-by-step explanation:

(wl+hl+hw)

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From the equation y−3=−2(x+1), identify the slope and a point on the line.
olga2289 [7]

Answer:

slope = - 2, point on line = (- 1, 3 )

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

y - 3 = - 2(x + 1) ← is in point- slope form

with slope m = - 2 and (a, b ) = (- 1, 3 )

4 0
3 years ago
Find the length of side AB. Round your answer to the nearest tenth:
Blizzard [7]

Answer: 3.1

Step-by-step explanation:

7 0
2 years ago
Construct a 95% confidence interval for the population mean, µ. Assume the population has a normal distribution. A sample of 25
bixtya [17]

Answer:C. (77.29, 85.71)

Step-by-step explanation:

We want to determine a 95% confidence interval for the mean test score of randomly selected students.

Number of sample, n = 25

Mean, u = 81.5

Standard deviation, s = 10.2

For a confidence level of 95%, the corresponding z value is 1.96. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean +/- z ×standard deviation/√n

It becomes

81.5 +/- 1.96 × 10.2/√25

= 81.5 +/- 1.96 × 2.04

= 81.5 +/- 3.9984

The lower end of the confidence interval is 81.5 - 3.9984 =77.5016

The upper end of the confidence interval is 81.5 + 3.9984 =85.4984

Therefore, the correct option is

C. (77.29, 85.71)

6 0
2 years ago
Angles measuring 8x – 3 and 7x + 18 are supplementary. Find the measure of each angle. (5 points)​
algol [13]

Answer:

The measures of the angles are 85 and 95 degrees each.

Step-by-step explanation:

Two angles are supplementary when they add up to 180 degrees.

Therefore, set up an equation and solve for the variable x in the first place.

(8x-3)+(7x+18)=180

8x-3+7x+18=180

8x+7x-3+18=180

15x-3+18=180

15x+15=180

15x=165

x=165/15

x=11

Angle 8x-3=8(11)-3=88-3=85.

Angle 7x+18=7(11)+18=77+18=95.

3 0
3 years ago
Read 2 more answers
Write an equation of a line in slope-intercept form that passes through the
Katen [24]

Answer:

y = x - 3

Step-by-step explanation:

First, you need to find the slope from the two given points.

y2 - y1 / x2 - x1

= 3 - (-1) / 6 - 2

= 1

The slope is 1x or simply x.

For the y-intercept, you need to plug one of the coordinates into the equation, which is y = x + b

3 = 6 + b

-3 = b

So the equation is y = x - 3

8 0
3 years ago
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