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PtichkaEL [24]
2 years ago
8

Select the correct answer. Graham puts $20 in his piggy bank every week. At the end of 39 weeks, he adds $100 to the piggy bank

money and decides to do the following: buy some clothes and sports gear for $314.23 buy his mom a present for $123 divide the rest of the money equally among his three brothers Use a calculator to find the amount of money each brother will get.
Mathematics
2 answers:
Masteriza [31]2 years ago
8 0

20*39 = 780

780+100 = 880

880-314.23-123 = 442.77

442.77/3

$147.59 each brother
tangare [24]2 years ago
6 0
First calculation :20 x 39 = $780
then, 780 + 100 = $880
minus with price of the clothes 880 - 314.23 = $565.77
minus the answer with his mom's present price 565.77- 123= 319.77
divide the answer by 3... 319.77/3 = $106.59
final answer =$106.59
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Answer:

21/20

Step-by-step explanation:

a) One hour is equivalent to 60 minutes.

So we can multiply 50 minutes by the fraction \frac{1 hour}{60 minutes}, so we could convert 50 minutes to hours.

It is:

50 minutes * \frac{1 hour}{60 minutes}=\frac{50}{60}hours

If we simplify the fraction, we have:

50 minutes = \frac{5}{6}hours

b) In order to express the turtle's speed in miles per hour, we have to divide

\frac{7}{8}miles by  \frac{5}{6}hours

So:

\frac{\frac{7}{8}miles }{\frac{5}{6}hours }

We simplify the expression by multiplying 7 mile by 6 and 8 by 5 hours:

\frac{\frac{7}{8}miles }{\frac{5}{6}hours}=\frac{42 miles}{40 hours} =\frac{21 miles}{20 hours}

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2 years ago
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Which algebraic expression is a polynomial? 4x2 – 3x + StartFraction 2 Over x EndFraction –6x3 + x2 – StartRoot 5 EndRoot 8x2 +
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Answer:

Step-by-step explanation:

"4x2 – 3x + StartFraction 2 Over x EndFraction" is definitely not a polynomial because one of the exponents of x is negative.

"–6x3 + x2 – StartRoot 5 EndRoot" is a polynomial because all of the exponents of x are integers 0 or greater.  

The presence of any root (fractional exponents included) of the variable x automatically disqualifies such expression:  it's not a polynomial.

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Rita walks on a treadmill for exercise. She creates the table below to show the relationship
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Answer:

Step-by-step explanation:

I dont know either help

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Cards numbered 500 through 799 are placed into a box. How many of the cards satisfy both of the conditions shown below?
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Answer:

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Step-by-step explanation:

4 0
2 years ago
Jake made a total of 7 copies at a copy shop, with some being black-and-white copies and some being color copies. Black-and-whit
Arada [10]
Jake spent a total of 70 cents.
b = black-and-white = 8 cents
c = color = 15 cents

70 = 8b + 15c

he made a total of 7 copies
b + c = 7

system of equation:
70 = 8b + 15c
b + c = 7

--------------------------

b + c = 7
b + c (-c) = 7 (-c)
b = 7 - c

plug in 7 - c for b

70 = 8(7 - c) + 15c
Distribute the 8 to both 7 and - c (distributive property)

70 = 56 - 8c + 15c
Simplify like terms

70 = 56 - 8c + 15c
70 = 56 + 7c

Isolate the c, do the opposite of PEMDAS: Subtract 56 from both sides

70 (-56) = 56 (-56) + 7c
14 = 7c

divide 7 from both sides to isolate the c

14 = 7c
14/7 = 7c/7
 c = 14/7
 c = 2

c = 2
---------------

Now that you know what c equals (c = 2), plug in 2 for c in one of the equations.
b + c = 7
c = 2
<em>b + (2) = 7
</em><em />Find b by isolating it. subtract 2 from both sides
b + 2 = 7
b + 2 (-2) = 7 (-2)
b = 7 - 2
b = 5

Jake made 5 black-and-white copies, and 2 color copies

hope this helps
8 0
2 years ago
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