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3 years ago

SOMEONE HELP!! 30 points!

Mathematics

1 answer:

Nostrana [21]3 years ago

6 0

Answer:

AB = square root of 403

Step-by-step explanation:

use the pythagorean theorem to solve for AB.

a^2 + b^2 = c^2

9^2 + b^2 = 22^2

81 + b^2 = 484

b^2 = 484 - 81

b^2 = 403

b = 20.07

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Meghan has two less dimes as she does nickels and one more than double the amount of quarters as she does nickels for a total of

defon

Answer:

The number of nickel = 3

Number of dime = 1

Number of quarter = 7

Step-by-step explanation:

Let us assume the number of nickels Meghan has = m

So, the number of dimes she has = m -2

And the number of quarters she has = 1 + 2 m

Now, the total amount she has = $2.00

1 nickel = $0.05 ⇒ m nickel = m ($0.05) = 0.05 m

1 dime = $0.10 ⇒ (m -2) dime = m-2 ($0.10) = 0.10 (m-2)

1 quarter = $0.25 ⇒ (1+ 2m) quarter = (1+ 2m) ($0.25) = 0.25 (1+2m)

So, according to the question:

Amount of (nickel + dime + quarter) = $2.00

⇒ 0.05 m + 0.10 (m-2) + 0.25 (1+2m) = 2

or, 0.05 m + 0.10 m - 0.20 + 0.25 + 0.5 m = 2

or, 0.65 m = 2 - 0.05

or, m = 1.95/0.65 = 3

or, m = 3

Hence, the number of nickel = 3

Number of dime = m -2 = 3-2 = 1

and Number of quarter = 2m + 1 = 7

8 0

4 years ago

PLEASE HELP ME WITH THIS

gladu [14]

Answer:

232

Step-by-step explanation:

First

Normally the average of something is total something over total time. I'll do it that way and see what happens.

The total time is ( 4 - 2) = 2 hours.

f(x) = 2^4 - 2 = 14

Change = 14/2 = 7 per hour.

Second

Average = Increase / time.

10000 (1.02)^10 - 10000 * (1.02)^5

10000*1.22 - 10000*1.104

12,200 - 11040

1160

The average per year = 1160 / 5 = 232

8 0

3 years ago

Paxton received the same score on each turn in a board game. His score on each turn was −21. He had 7 turns. What was Paxton's f

PSYCHO15rus [73]

Answer:

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Mary has 200ml of hand sanitizer that is 15% alcohol. She mixes it with 200ml of a

11Alexandr11 [23.1K]

Answer:

(370-2x)ml

Step-by-step explanation:

We are given that

In first hand sanitizer

Total solution=200ml

Alcohol=15% of 200ml

Alcohol= $\frac{15}{100}\times 200=30ml$

In second hand sanitizer

Solution=200 ml

Alcohol=x% of 200 ml

Alcohol= $\frac{x}{100}\times 200=2x ml$

We have to find the water in the resulting mixture of hand sanitizers.

Total solution of two hand sanitizers=200+200=400ml

Total alcohol in two hand sanitizers=(30+2x)ml

Water in two hand sanitizers=400-(30+2x) ml

Water in two hand sanitizers=400-30-2x ml

Water in two hand sanitizers=(370-2x)ml

Hence, water in the resulting mixture of hand sanitizers=(370-2x)ml

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3 years ago

A quotient of a number 4 at most 5

Kitty [74]

The answer would be x/4<=5

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3 years ago