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tiny-mole [99]
3 years ago
10

lex has 84 quarters and nickels worth a total of $17.80. Which equation can be used to find q, the number of quarters Alex has?

Mathematics
2 answers:
Marianna [84]3 years ago
5 0

Answer:

0.05 (84 - Q) + 0.25Q = 17.80

Step-by-step explanation: just did it on edge

emmasim [6.3K]3 years ago
3 0
There are 68 quarters and 16 nickels
You might be interested in
Please help me! Need answer quick!
aksik [14]

Let h = height of triangle


h^2 + 12^2 = 15^2


h^2 + 144 = 225


h^2 = 225 - 144



h^2 = 81


sqrt{h^2} = sqrt{81}


h = 9 cm


For part B, we need to find surface area because it represents the perimeter of this 3-D figure. The formula needed is SA = B + LA.


1. First find the lateral area.


LA = perimeter of triangle • height


LA = ph


p = 15 + 15 + 24


p = 30 + 24


p = 54 cm


LA = (54)(9)


LA = 486 cm^2


2. We now find the base of each triangle. This is found by finding the area of each triangle and multiplying by 2.


A = (1/2)bh


A = (1/2)(24)(9)


A = 108 cm^2


A = 2•108 cm^2


A = 216 cm^2 = our B in the surface area formula.


SA = B + LA


SA = 216 cm^2 + 486 cm^2


SA = 702 cm^2


The amount of cardboard needed is 702 cm^2.






6 0
3 years ago
If x < 5, then which of the following must be true? - x < 5 - x > -5 - x > 5 - x < -5
Nat2105 [25]

Answer:

-x > -5

Step-by-step explanation:

Let's start with a positive number less than 5.

4<5

likewise when applied to -x> -5

-4>-5

4 0
3 years ago
What is the value of s?​
Leya [2.2K]

Answer: a value is like how much is the pice or like counting money

Step-by-step explanation:

8 0
3 years ago
What is the volume of the cone with a diameter of 9ft and a height of 15ft? Use the formula v - 5 nr?h. Use 3.14 for 5 and round
Juli2301 [7.4K]

Answer:

V≈318.09ft³

Step-by-step explanation:

V=πr2h/3

=π·4.52·15/3

≈318.08626ft³

8 0
2 years ago
Which of the following statements describes the absolute value of a number "a"?
Softa [21]
This is a tricky question as for me. But I think, I'd go with <span>C) The distance from the number "a" to 0 on a number line can be represented by the absolute value of a number "a." As it's sounds better in practical way.</span>
5 0
3 years ago
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