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Strike441 [17]
3 years ago
7

In 1990, there were 4,298,000 Mexican immigrants living in the United States. In 2000 this number had increased to 7,858,000. Fi

nd the percent of increase to the nearest tenth. a. 69.6% c. 82.8% b. 101% d. 90.2%
Mathematics
1 answer:
Rzqust [24]3 years ago
4 0

Answer:

c

Step-by-step explanation:

In thousands:

7858 - 4298 = 3560

\frac{3560}{4298} = .828

4298 \times 1.828 = 7857

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Sam wants to buy 8 pencils and 6 pens, which cost a total of $8.50. He realizes he doesn't have enough cash and instead takes on
Diano4ka-milaya [45]
X = pencils, y = pens

8x + 6y = 8.50
4x + 4y = 5.....multiply by -2
----------------
8x + 6y = 8.50
-8x - 8y = -10 (result of multiplying by -2)
-----------------add
-2y = - 1.50
y = -1.50 / -2
y = 0.75 <=== pens cost 0.75

4x + 4y = 5
4x + 4(0.75) = 5
4x + 3 = 5
4x = 5 - 3
4x = 2
x = 2/4
x = 0.50 <== pencils cost 0.50
8 0
4 years ago
A package of 12 pencils cost $0.96. At this rate, how much would 100 pencils cost?
Alexandra [31]

Answer:$8

Step-by-step explanation:

6 0
3 years ago
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What is the correct answer to the math problem<br> 20+30×0+1
Bumek [7]
21
is what I got on my calculator
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3 years ago
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Solve for the variable "a" in this equation. Show work:<br><br> c=8πab
Contact [7]
C=8πab
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7 0
4 years ago
Please answer it correctly and please show work please help me I need it
tamaranim1 [39]

Answer:

the equation is

y = 0.75x

And,  the constant of proportionality is 0.75

Step-by-step explanation:

The computation is shown below:

Given that

4y = 3x

And,

12y = 9x

Here the equation that represent proportional relationship is

4y = 3x

Divide both sides by 4

y = 3x ÷ 4

Now

12y = 9x

divides both sides by 12

y = 9 ÷ 12x

y = 3 ÷ 4x

y = 0.75x

so the equation is

y = 0.75x

And,  the constant of proportionality is 0.75

4 0
3 years ago
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