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Citrus2011 [14]

3 years ago

15

WILL GIVE BRAINLIEST. Joanna saves nickels and quarters in a jar. If she saved five times as many nickels as quarters, and her c

oin collection is worth $390, how many quarters has she saved?

1 answer:

vekshin13 years ago

3 0

Answer:

78 quarters

Step-by-step explanation:

I think because, I created an equation, 5x = 390 and solves to get 78

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Can someone answer this

attashe74 [19]

Answer:

Step-by-step explanation:

axis: x= 2

vertex: (2,3)

6 0

3 years ago

At a college the scores on the chemistry final exam are approximately normally distributed, with a mean of 75 and a standard dev

AysviL [449]

Answer:

b) Chemistry

Step-by-step explanation:

To compare both scored we need to standardize the scores using the following equation:

$\frac{x-m}{s}$

Where x is the score, m is the mean and s is the standard deviation. So, 82 on chemistry is equivalent to:

$\frac{82-75}{15}=0.4667$

Because the mean of the scores on the chemistry final exam is equal to 75 and the standard deviation is 15

At the same way, 80 on Calculus is equivalent to:

$\frac{80-83}{13} =-0.2308$

Because the mean of the scores on the calculus final exam is equal to 83 and the standard deviation is 13

Now, we can compare the values. So, taking into account that -0.2308 is lower than 0.4667, we can said that the student do better in Chemistry.

5 0

3 years ago

Make Sense and Preserve. Grade 9 Council is raising money for class dances by selling spirit T-

Ugo [173]

Answer:

4 dollars or 13 dollars

Step-by-step explanation:

Revenue is the income or increase in net assets that a commercial organization have as a result of offering services.

Revenue is the product of selling price per goods and the number of goods sold. That is:

Revenue = selling price per goods * number of goods sold

Given the revenue function:

R=-n² +17n +200; where n is the increase in the original price of T-shirt.

Since the council wants to make a revenue of $250, hence:

-n² +17n +200 = 250

-n² + 17n - 50 = 0

Solving using a calculator gives:

n = $4 or $13 (to the nearest whole number)

8 0

3 years ago

1 . The ratio of 3 1/3 to 2 1/4 is equal to the ratio of? <br>

Nikitich [7]

Answer:

40 : 27

Step-by-step explanation:

$3\frac{1}{3} : 2\frac{1}{4}$

Turn into improper fractions:
$\frac{10}{3} : \frac{9}{4}$

Make them integers by multiplying them by 12:
40 : 27

3 0

2 years ago

What is the difference between -4 and 6

LenaWriter [7]

Hey,

Answer:

2 and -2

Good luck :)

4 0

3 years ago