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pantera1 [17]
2 years ago
7

Compare the rates to find which is the best value.

Mathematics
1 answer:
sattari [20]2 years ago
5 0

Answer:

C6 greeting cards for $23.40

Step-by-step explanation:

A. 13.5/3=4.5

B. 38.25/9=4.25

C. 23.4/6=3.9

d. 32.8/8=4.1

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Lisa and Joey are each saving money for their prom. Lisa’s total amount of money is represented by the function f(x)=20-13x. The
crimeas [40]

Answer:

2 weeks

Step-by-step explanation:

Given in the question that,

Equation that represent Lisa's total amount of money

f(x) = 20 - 13x

Equation that represent Joey's total amount of money

g(x) = x² - 10

To find weeks, x, after which they will have same amount of money, we will equate both equation

<h3>20 - 13x =  x² - 10</h3>

x² - 10 - 20 + 13x = 0

x² - 30 + 13x = 0

x² + 13x - 30 = 0

(x - 2)(x + 15) = 0

x = 2 or x = -15

Weeks, x, can not be negative so we will reject x = -15

Hence, after 2nd week Lisa and Joey will have the same amount of money save.

4 0
3 years ago
What expression is equivalent to -28xy+35y
Tasya [4]
Multiply -28 by 35 and you will then get the answer
8 0
3 years ago
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I need help with finding the answer of 21 laps in 7 minutes
Dimas [21]
I'm not sure if that's what you mean, but I assume you might want to know how long did it take to make one lap if someone did 21 laps in 7 minutes.

If so, just divide 7 by 21:

7 ÷ 21 = 0.3333333... (repeating decimal) or 1/3 as a fraction.

It means that one lap took 1/3 of a minute (20 seconds).

If that's not what you meant, please specify the question :)
8 0
2 years ago
PLEASE HELP ASAP<br><br> Factor Completely <br> y^2+10y
Mariulka [41]

Answer:

A y(y+10)

Step-by-step explanation:

7 0
3 years ago
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What is the equation of the line shown in the graph?
ipn [44]
X=2y because whenever x goes up one, y goes up two
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