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Nina [5.8K]
3 years ago
11

Mark wrote the highest score he made on his new video game as the product of 70*6000. Use the associative and commutative proper

ties to show how mark can calcule this product mentally
Mathematics
1 answer:
Alex777 [14]3 years ago
8 0
Mark can:

7*6=42
then just add back the 4 zeros

so its 42 0000
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Devin has $30 on his bus card. Every time he rides a bus, $1.20 is deducted from the value on his card. The amount if money he h
vaieri [72.5K]

Answer:

y = -1.2x + 30

x = 22

x = 15

Step-by-step explanation:

<u>Part A</u>

Initially, Devin has $30.  Then every time he rides the bus, $1.20 is taken away:  y = 30 - 1.2x

Therefore, in slope-intercept form:  y = -1.2x + 30

If he has $3.60 on his card, then y = 3.60, so substitute this into the above equation and solve for x:

                                                  3.60 = -1.2x + 30

subtract 30 from both sides:  -26.4 = -1.2x

divide both sides by -1.2:             22 = x

Therefore Devin has ridden the bus 22 times if he has $3.60 on his card.

<u>Part B</u>

Rebecca:  y = -1.4x + 33

To determine how many rides on the bus Devin and Rebecca would need to take to have the same amount of value of their bus card, simply equate the equations and solve for x:

                                          Rebecca = Devin

                                                       y = y

                                         -1.4x + 33 = 30 - 1.2x

subtract 33 from both sides:   -1.4x = -3 - 1.2x

Add 1.2x to both sides:           -0.2x = -3

Divide both sides by -0.2:             x = 15

Therefore, Devin and Rebecca would both have to take 15 rides on the bus to have the same amount of value of their bus card.

6 0
2 years ago
Simplify this expression (5)^ -5 (5)^ 7 please explain how you got the answer
Rina8888 [55]

Answer:

( {5}^{ - 5} ) \times ( {5}^{7} ) \\  \\  \frac{ {5}^{7} }{ {5}^{5} }  =  {5}^{7 - 5}  =  {5}^{2}

the answer is b. 25

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3 years ago
A graph has seconds after water began leaking on the x-axis, and volume of water in cup (milliliters) on the y-axis. A line goes
xz_007 [3.2K]

Answer:

b

Step-by-step explanation:

edge

7 0
2 years ago
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Marcus was asked to find out what affects the strength of electromagnets. He was given a simple electromagnet made from a coil o
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2 years ago
How much does mike charge a new customer to ship a package that weighs 50 pounds ? He chargers $40 per pound.
Vera_Pavlovna [14]

Answer:

$2000

Step-by-step explanation:

For each pound, the charge is $40. There are 50 such charges. The point of multiplication is to simplify the process of repeated addition.

... 50 × $40 = $2000

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3 years ago
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