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3 years ago

15

Anais a math tracher noticed that the average grade on an exam, G, given that n students watch the related video can be given by

the function G(n)=50+1.5n.

2 answers:

Ket [755]3 years ago

6 0

This is what I got for the answer tell me if I’m wrong

snow_lady [41]3 years ago

3 0

Answer:

95 - 1.5m

Step-by-step explanation:

G(S(m))=G(30-m)

=50+1.5(30 - m)

simplify

=50+1.5(30 - m)

=50+45 - 1.5m

=95 - 1.5m

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The length of a rectangle is one more than 2 times the width. if the perimeter of a rectangle is 29 inches, find the length

tigry1 [53]

The length of the rectangle is 7 and the width is 3.

6 0

3 years ago

Jessica has a four-sided die, a six-sided die, and a 12-sided die. She rolls the three dice once. Let Z be the number of fours s

yawa3891 [41]

Answer:

The value of E [Z] is 0.50.

Step-by-step explanation:

The expected value is computed using the formula:

$E(X)=\sum x\cdot P(X= x)$

Denote the three dices as follows:

X₁ = a four-sided die

X₂ = a six-sided die

X₃ = a 12-sided die

Define the indicator variables as follows:

$I_{1}=\left \{ {{1;\ X_{1}=4} \atop {0;\ X_{1}\neq 4}} \right. \\\\I_{2}=\left \{ {{1;\ X_{2}=4} \atop {0;\ X_{2}\neq 4}} \right. \\\\I_{3}=\left \{ {{1;\ X_{3}=4} \atop {0;\ X_{3}\neq 4}} \right.$

The probability of rolling a 4 in the three dices are as follows:

$P(X_{1}=4)=\frac{1}{4}\\\\P(X_{2}=4)=\frac{1}{6}\\\\P(X_{3}=4)=\frac{1}{12}$

Compute the value of E [Z] as follows:

$E(Z)=E(I_{1})+E(I_{2})+E(I_{3})$

$=(1\times\frac{1}{4})+(1\times\frac{1}{6})+(1\times\frac{1}{12})\\\\=\frac{3+2+1}{12}\\\\=\frac{6}{12}\\\\=\frac{1}{2}\\\\=0.50$

Thus, the value of E [Z] is 0.50.

8 0

3 years ago

How would you solve this?

gulaghasi [49]

Answer:

Step-by-step explanation:

Find the slope = -2/1

Find the y-intercept = 5

Go to graph

put a dot at (0,5)

since it's a negative slope you will go up 2 and left 1

draw your line

_________________________________________________

Find the slope = 3/1

Find the y-intercept = 0

go to graph

Put a dot at (0,0)

Since it is a positive slope you will go down 3 and left 1.

To find the slope and y-intercept use this formula=

y=mx+b

m=slope

b=y-intercept

I'm sorry I don't know how to do a check equation for these.

3 0

3 years ago

Simplify 9 + 6k +3 +212 +3 +7

melisa1 [442]

Answer:

6k+234

Step-by-Step Explanation:

Add 9, 3, 212, 3, and 7. You get 234. You can't change 6k because the variable, so you end up with 6k+234.

8 0

3 years ago

Read 2 more answers

Can you help me simplify this and explain it -----------------------------------------------------------------------------------

Archy [21]

A. Factor 28 + 7g 7(g <span>+ 4)

add
28 </span><span>+ 7g

= 7 (g </span>+ 4)

B. (12r + 15) – 65 Remove parentheses
12r+15-65

= 12r - 50

C. 24 – (8p – 12)

24 - (8p - 12) = -8p + 36

24 - (8p - 12) -(8p - 12) 8p + 12

= 24-8p+12

Simplify 24-8p+12

Group like terms
-8p+12+24

Add the numbers 12+24=36

Answer is -8p+36

7 0

3 years ago