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3 years ago

Calculate using order of operations.7.8+6.2×(4-1.5)×4

Mathematics

2 answers:

nasty-shy [4]3 years ago

8 0

Answer:

I believe that the answer is 69.8

KIM [24]3 years ago

5 0

The answer is 69.8 I did the math if you can give me brainliest

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Answer this, pic below.

Bad White [126]

Answer:

constant

Step-by-step explanation:

8 0

3 years ago

Carlos bought an item online for $160 and he was charged $8 fee for shipping. What was the percent of the sale was the shipping

prohojiy [21]

Shipping charge was 5%

6 0

3 years ago

The U.S. Energy Information Administration claimed that U.S. residential customers used an average of 10,608 kilowatt hours (kWh

Marat540 [252]

Answer:

The calculated value Z = 1.4460 < 1.96 at 0.05 level of significance.

The null hypothesis is accepted

A local power company believes that residents in their area use more electricity on average than EIA's reported average

Step-by-step explanation:

Step(i):-

Given that the mean of the Population = 10,608 kWh of electricity this year.

Given that the size of the sample n = 187

Given that mean of sample x⁻ = 10737 kWh

The Standard deviation of the Population = 1220kWh

Level of significance = 0.05

The critical value (Z₀.₀₅)= 1.96

Step(ii):-

Null Hypothesis: H₀:μ > 10608 kWh

Alternative Hypothesis: H₁: μ < 10608kWh

Test statistic

$Z = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }$

$Z = \frac{10737- 10608 }{\frac{1220}{\sqrt{187} } }$

Z = 1.4460

Final answer:-

The calculated value Z = 1.4460 < 1.96 at 0.05 level of significance.

The null hypothesis is accepted

A local power company believes that residents in their area use more electricity on average than EIA's reported average.

3 0

3 years ago

which of the following is not a way to represent the solution of the inequality 8x − (5x 4) greater than or equal to −31? a. x g

IgorLugansk [536]

8x - (5x + 4) ≥ -31

8x -5x - 4 ≥ -31

3x ≥ -31 + 4

3x ≥ -27

x ≥ - 9

Answer: a numbe line with a circle on - 9 and shading to the left.

Because that drawing represents the number that are less or equel than -9 and the answer is the numbers greater or equal than -9.

7 0

3 years ago

What is the slope of the line on the graph? Enter your answer in the box.

Firlakuza [10]

Answer:

I think this is the answer you are looking for. (See below)

Step-by-step explanation:

From the given graph it is noticed that the line is passing through many points.

The coordinates of three given points are (1,5), (-1,-1), (-1,-7)

If a line passing through two points (x1 ,y1) and (x2, y2) , the slope of the lie is defined by, m= y2 - y1/x2 - x1

The line passing through two points (-1,1) and (1,5). So the slope of the line is, m= 5 - 1 / 1 minus -1

m=4/2

Therefore, the slope of the line is 2.

Pls if this is wrong, let me know in the comments. I'm not really good at this topic in math but I hope it helps you. Sorry if it is wrong. Have a good day. :)

6 0

3 years ago

Calculate using order of operations.7.8+6.2×(4-1.5)×4​

Calculate using order of operations.7.8+6.2×(4-1.5)×4