All categories

3 years ago

Please hurry! If you don't know it, that's okay.

Mathematics

1 answer:

makvit [3.9K]3 years ago

7 0

Answer:

The answer is (x,y)=(-10,-7)

Step-by-step explanation:

The solution comes from replace x= -10 into the equation of y=2/5 x -3.
Replacement of x= -10 into y = 2/5 x -3 results: $y=\frac{2}{5}\times{(-10)}-3=2\times{(-2)} -3=-4-3=-7$ .

You might be interested in

Translate this phrase into an algebraic expression. Six more than the product of 9 and Goran's age Use the variable g to represe

aleksandrvk [35]

9g+6 is the expression you’re looking for

6 0

2 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

2 years ago

Help ASAP 2k-6-7+3k=-48

k0ka [10]

Answer:

k=-7

Step-by-step explanation:

2k-6-7+3k=-48

Combine like terms

5k -13 = -48

Add 13 to each side

5k-13+13 = -48+13

5k = -35

Divide by 5

5k/5 = -35/5

k =-7

7 0

3 years ago

Read 2 more answers

Please help I don't understand

7nadin3 [17]

Answer:

1<x≤8

Step-by-step explanation:

x is greater than one, but is less than or equal to 8

4 0

3 years ago

nignag [31]

Answer:

1st = 4×10 ^-9

2nd= 4×10^1

3rd = 4×10^7

4th = 4×10^-5

Step-by-step explanation:

for whole numbers you just have to count from the ending till the number indicated beside the x10

for decimals you count from the front starting at the decimal till you cover the whole number

6 0

8 months ago