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4 years ago

Cost to store: $80 Markup: 60%

Mathematics

1 answer:

valina [46]4 years ago

3 0

Question please? that might come in handy

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Six classrooms lost electricity this morning for 47 minutes. Determine the percent of an hour that the classrooms were without e

meriva

They were without electricity for 47 minutes.....determine the percent of an hr....so 1 hr = 60 minutes.....so they were out 47 out of 60 minutes...
47/60 = 0.783 = 78.3%.....so just type in 78.3 because ur not supposed to include the percent sign

8 0

3 years ago

Based on a poll of 100 citizens, a community action group claims that 38% of the population is in favor of the construction of a

tatyana61 [14]

Answer:

(0.55, 0.75)

Step-by-step explanation:

The range can be estimated to be 6 standard deviations wide. Therefore, the standard deviation is:

σ = (0.72 - 0.42) / 6

σ = 0.05

The margin of error is ±2σ, so:

ME = ±0.10

Therefore, the interval estimate is:

(0.65 - 0.10, 0.65 + 0.10)

(0.55, 0.75)

8 0

3 years ago

What is the slope of a line perpendicular?<br><br> y=-3/4x +3

almond37 [142]

4/3
Remember if two lines are perpendicular, the product of their slopes are -1

8 0

3 years ago

Read 2 more answers

Need help for question 8 and 9. I need the equation that’s passes through the points!

dsp73

Answer:

Step-by-step explanation:

Question 8

Let the equation of a line passing through two points $(x_1,y_1)$ and $(x_2,y_2)$ is given by,

y = mx + b

Here, m = slope and y-intercept = b

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

For two points (1, 4) and (5, 8),

m = $\frac{8-4}{5-1}$

m = 1

Equation will be,

y = (1)x + b

y = x + b

Since, this line passes through (1, 4),

4 = 1 + b

b = 3

Therefore, equation of the line will be,

y = x + 3

Question 9

Let the equation is y = mx + b

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

For two points (2, 10) and (6, 4)

m = $\frac{10-4}{2-6}$

m = $-\frac{3}{2}$

By substituting the value of 'm' in the equation,

y = $-\frac{3}{2}x+b$

Since, this line passes through (2, 10)

10 = $-\frac{3}{2}(2)+b$

b = 10 + 2

b = 12

Therefore, equation of the line will be,

$y=-\frac{3}{2}x+12$

4 0

3 years ago

PLEASE HELP I GIVE THANKS

jonny [76]

Corresponding angles are angles that are equal in degrees and in this case it is <8 and <4 but there is also <5 and<7.

7 0

3 years ago