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4 years ago

Please help with this my teacher isn't responding!!!

Mathematics

1 answer:

Nady [450]4 years ago

4 0

Answer:

Step-by-step explanation:

yes right anwser

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Restaurant has an early bird special of $7 per plate before 4 PM. The regular price after 4 PM is $9 per plate. If the restauran

Semenov [28]

Answer:

the early bird special plate is 52

Step-by-step explanation:

Let us assume the early bird special be x

And, regualr price be y

Now the equations are

x + y = 93

7x + 9y = 733

Now multiply by 7 in equation (1)

7x + 7y = 651

7x + 9y = 733

Now subtract these two equations

-2y = 82

y = 41

x = 93 - 41

= 52

hence, the early bird special plate is 52

8 0

3 years ago

Which expressions are equivalent to -3 -(7.5+4)

natulia [17]

Answer:

-8,5

Step-by-step explanation:

-3-(7,5+4)

=-3-11,5

=-8,5

7 0

3 years ago

The length of a plank is measured by using a meter rule and the value obtained is reported as 2.4m. Why is this reading inapprop

maw [93]

One meter ruler is not sufficiently long to quantify length longer than 1m

7 0

3 years ago

What is the range of the fucntion,(6,5)(8,-3)(10,-8)(12,7)

scZoUnD [109]

Answer:

5,-3,-8,7 are the range of the function

8 0

3 years ago

9. What is the likelihood that a randomly selected couple's relationship survived between 90 and 150 days

andrew-mc [135]

Answer:

0.5818

Step-by-step explanation:

Suppose the average teenage romantic relationship is normally distributed with a mean number of 100 days with a standard deviation of 30 days.

Answer:

The z score is used to determine how many standard deviations that the raw score is above or below the mean. If the z score is positive then the raw score is above the mean and if it is negative then it is below the mean. It is given by:

$z=\frac{x-\mu}{\sigma}\\ \\where\ \mu=mean,\sigma=standard\ deviation, x=raw\ score$

Given that:

$\mu=100\ days,\sigma=30\ days\\\\For\ x=90\\\\z=\frac{90-100}{30} =-0.33\\\\For\ x=150\\\\z=\frac{150-100}{30} =1.67$

Therefore, from the normal distribution table, P(90 < x < 150) = P(-0.33 < z < 1.67) = P(z < 1.67) - P(z < -0.33) = 0.9525 - 0.3707 = 0.5818

7 0

3 years ago