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andreyandreev [35.5K]

3 years ago

11

the lighting for a billboard is provided by solar energy. if 4 energy panels generate 10 watts of power, how many panels are nee

ded to provide 550 watts of power?

1 answer:

viktelen [127]3 years ago

3 0

10/4
To get then watts per panel
550 / the Watts per panel to get the number of panels need

Always round this up if necessary

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you have 5 mini pizzas to share with 4 friends. You're cutting the pizzas in half, how much will each friend? How can you make s

Alona [7]

I believe that they will get 1 and 1/2 of a pizza and u would have to cut the pizza in half to the point u can give all four of them the left over I hope this works I really don't know I tried

7 0

3 years ago

The straight line PQ with P(1,6) and Q(-6, 1). PQ is mapped onto P'Q' by a reflection in the line = 2. What are the coordinates

SSSSS [86.1K]

Answer:

$P' = (1,-2)$

Step-by-step explanation:

Given

$P = (1.6)$

$Q = (-6,1)$

Reflection over: $y = 2$

Required

Determine the coordinates of P'

From the given coordinates, the y coordinates of P is 6 and the line of reflection is at y = 2

Since we are to reflect over y = 2, only the y coordinate of P will be affected.

The idea behind reflecting a point over a line is to have an equal distance between [the original point & the line of reflection] and [the new point & the line of reflection]

So, what to do is:

First, calculate the difference between the y coordinates of P and the line of reflection.

The y coordinate of P is 6 and the line of reflection is at y = 2.

So, the difference is: 6 -2 = 4

Next, subtract the calculated difference from the line of reflection to get the y coordinate of P'

y coordinate of P' = 2 - 4 = -2

<em>Hence, the coordinate of P' is: (1,-2)</em>

7 0

3 years ago

Johnny bought 10 cupcakes for 12 dollars, how much would 15 cost?

PtichkaEL [24]

Answer:

18

Step-by-step explanation

10=12

must mean 5=6

12+6=18

15=18

18 dollars

he also has diabetes and drinks diet coke

7 0

3 years ago

What is the degree of f(x) = (x + 3)(x - 1)(2x + 2)?<br><br>A. 1 B.2 C.3 D.4

Semmy [17]

Answer:

I believe the answer is c) 3

Step-by-step explanation:

f(x) = (x + 3)(x - 1)(2x + 2)

x(x) + x(-1) + 3(x) + 3(-1)

f(x) = (x^2 - x + 3x - 3)(2x + 2)

f(x) = (x^2 + 2x - 3)(2x + 2)

2x(x^2) + 2x(2x) + 2x(-3) + 2(x^2) + 2(2x) + 2(-3)

f(x) = (2x^3 + 4x^2 - 6x + 2x^2 - 6)

<u>f(x) = (2x^</u><u>3</u><u> + 6x^2 - 6x - 6)</u>

4 0

3 years ago

In recent years the mean number of miles driven per year by residents of a particular state was 11,568. A researcher wishes to t

aleksandrvk [35]

Answer:

The degrees of freedom are given by:

$df =n-1= 62 -1=61$

And we want to find a critical value on the t distribution with 61 degrees of freedom who accumulates 0.025 of the area on each tail and the critical value would be $t_{\alpha/2}= \pm 2.00$

And the rejection region would be $|t_{calc}| >2.00$

Step-by-step explanation:

Data given and notation

$\bar X=10822$ represent the sample mean

$s=1741$ represent the sample standard deviation

$n=62$ sample size

$\mu_o =11568$ represent the value that we want to test

$\alpha=0.05$ represent the significance level for the hypothesis test.

z would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the true mean differs from 11568, the system of hypothesis would be:

Null hypothesis: $\mu =11568$

Alternative hypothesis: $\mu \neq 11568$

The degrees of freedom are given by:

$df =n-1= 62 -1=61$

And we want to find a critical value on the t distribution with 61 degrees of freedom who accumulates 0.025 of the area on each tail and the critical value would be $t_{\alpha/2}= \pm 2.00$

And the rejection region would be $|t_{calc}| >2.00$

8 0

3 years ago