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Aleks [24]
3 years ago
13

In a recent survey, 230 or 46% of the sample, said they usually ate fast food when they went out to eat. How many people were su

rveyed?
Mathematics
1 answer:
galben [10]3 years ago
4 0
500 people were surveyed.
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Suppose that replacement times for washing machines are normally distributed with a mean of 9.3 years and a standard deviation o
Ad libitum [116K]
The probability will be found as follows:
z-score is given by:
z=(x-μ)/σ
where:
mean-μ=9.3
standard deviation-σ=1.1 
but
σ/√n=1.1/√70=0.1315
thus the z-score will be:
z=(9.1-9.3)/0.1315
z=-1.5209
thus:
P(x<9.1)=P(z<-1.5209)=0.0643
7 0
3 years ago
If Mark gets 150 free miles, how many miles will he be charged for with these two odometer readings: 29,582 and 30,283?
lapo4ka [179]
He will be charged for 551 miles.

30283-29582=701 miles traveled in the rental vehicle.

150 of those miles are free; 701-150 = 551 miles he will be charged for.
8 0
3 years ago
Read 2 more answers
Y = (x+3)² – 64<br> how do you write this in standard form
gregori [183]

Answer:

i think its y = x² + 6x - 55

7 0
2 years ago
Practice 7) fill in the blanks.
DiKsa [7]

(h,k) is the vertex

b/2a is the line of symmetry

a > 0 parabola opens upward, vertex is a minimum

a < 0 parabola opens downward, vertex is a maximum

My first answer was deleted lolol

7 0
3 years ago
∠A=5x−18. ∠B=3x+42∘ solve for x and then find the measure of ∠A
KatRina [158]

Answer:

x = 30 ∠A = 132 degrees

Step-by-step explanation:

Set the equations equal to each other to solve for x

5x - 18 = 3x + 42

-3x        - 3x               Subtract 3x from both sides

2x - 18 = 42

    + 18  + 18              Add 18 to both sides

2x = 60                     Divide both sides by 2

x = 30

Now plug this into the equation for angle A

∠A = 5(30) − 18        Multiply

∠A = 150 - 18           Subtract

∠A = 132 degrees

If this answer is correct, please make me Brainliest!

6 0
3 years ago
Read 2 more answers
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