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tester [92]
3 years ago
11

Justin has only nickels and quarters in his piggy bank he’s 49 coins total for combined value of $8.85 how many of each type of

coin does he have
Mathematics
1 answer:
Pavlova-9 [17]3 years ago
8 0
17 nickels and 32 quarter.

Here's my work!

x = nickels
y = quarters

x + y = 49

.05x + .25y = 8.85

x + y = 49. = y= -x + 49

.05x +.25( -x + 49 ) = 8.85
.05x + -.25x + 12.25 = 8.85
-.2x + 12.25 = 8.85
- 12.25. -12.25

-.2x = -3.4
÷-.2x. ÷-.2x
x=17

x + y = 49
17 + y = 49
-17. -17

y=32

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Aneli [31]

Answer:

The volume is 2140.98 inches³

Step-by-step explanation

The basketballs are spherical, and it is known that the volume of a sphere is

V = \frac{4}{3}\pi r^{3}

Where V is the volume of the ball and r is its radius


They tell us that the ball measures 8.8 inches wide. This means that its diameter is 8.8 inches.

It is known that the radius of a sphere is equal to half its diameter.

Therefore, the radius r of the ball is:

r = \frac{8.8}{2}

r = 4.4 inches.

Then, they tell us to consider that the walls of the ball are infinitely thin, which means that we should not take into account their thickness in the calculation of the volume.

We already have all the data we need, now we proceed to calculate the volume.

V = \frac{4}{3}\pi(4.4)^{3}\\V = 356.83 inches^{3}

Where V is the volume of only one of the balls

The volume of the six balls is V = 6 * 356.83 = 2140.98 inches³

Finally the volume is 2140.98 inches³

4 0
3 years ago
Read 2 more answers
What the answers for those questions
Minchanka [31]

The answers are

11. c) 7x² +5x +8 remainder 7.

12. d) 6x² -6x +3 remainder 2x.

Step-by-step explanation:

Step 1; By dividing 7x³ -2x² +3x -1 with x -1 we get the following calculations. We multiply 7x² with x-1 and get 7x³ - 7x². We subtract this from 7x³ -2x² and get 5x². Now we add this with the 3x in 7x³ -2x² +3x -1. We get 5x² +3x. We multiply x -1 with 5x and get 5x² -5x and subtract it from 5x² +3x and get 8x. We multiply the x -1 with 8 and get 8x -8. We subtract this from 8x -1 and get a remainder of 7. So the quotient is 7x² +5x +8 with a remainder of 7.

Step 2; By dividing 6x^{4} +0x³ -3x² +5x with x² +x we get the following calculations. We multiply 6x² with x² +x and get 6x^{4} +6x³. We subtract this from 6x^{4} +0x³ and get -6x³. Now we add this with the -3x² in 6x^{4} +0x³ -3x² +5x. We get -6x³ -3x². We multiply x² +x with -6x and get -6x³ -6x² and subtract it from -6x³ -3x² and get 3x². We multiply the x² +x with 3 and get 3x² +3x. We subtract this from 3x² +5x and get a remainder of 2x. So the quotient is 6x² -6x +3 with a remainder of 2x.

4 0
3 years ago
!NEED ANSWER ASAP!
ValentinkaMS [17]

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5 0
3 years ago
Please help me with this.
katen-ka-za [31]

Answer:

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look at the minute hand. it is on 9, which means 45

we can cross out 3:45 as the hour hand is not between 3 and 4.

this leaves us with 2:45

hope this helps :)

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lesantik [10]

Answer:

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Step-by-step explanation:

I divided 2438 by 14 and got 174 mph.

6 0
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