3 years ago

Help Asap 20 points!! And Brainlist!!!

Mathematics

1 answer:

Alenkasestr [34]3 years ago

5 0

Answer: 2(5c - 1x)

Step-by-step explanation: It's asking you to take out the greatest common factor (GCF).

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IS the decimal number 5.078, the digit in the hundredths place is a 7.<br>TRUE OR FALSE?????

Ksju [112]

Answer:

TRUE

The 7 is in the hundredths place

The 0 is in the tenths place

The 8 is in the thousandths place

Step-by-step explanation:

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3 years ago

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A family went out to eat at a restaurant. Their bill came to $64.20. They want to leave a 20% tip. How much will they leave as a

adelina 88 [10]

Answer:

$12.84

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3 years ago

How much of an alloy with 30% copper must be added to 25 pounds of a second alloy that is 20% copper to create a 27% alloy? 33.8

yuradex [85]

Answer:

58.33 lbs.

Step-by-step explanation:

There are already 25 lbs of alloy of copper

Of this 25 lbs, 20% is pure i.e. copper content = 25(0.5) = 5lbs.

Now available is

Copper Other metals

5 lbs 20 lbs

Let x lb of 30% copper is added.

Then new alloy will have 5+0.3x lb copper in total of 25+x lbs

Percentage pure = $\frac{5+0.3x}{25+x} =27%$

Simplify to get

$\frac{5+0.3x}{25+x} =\frac{27}{100} \\\\Cross multiply:\\27(25+x) =100(5+0.3x)\\500+30x =675 +27x\\3x = 175\\x = 175/3 = 58.33 lbs$

Hence answer is 58.33 lbs should be added.

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3 years ago

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On any given day, the number of users, u, that access a certain website can be represented by the inequality |125-u|<30

timofeeve [1]

Answer:

Step-by-step explanation:

it means that

125-30 < u < 125+30 so

95 < u < 155

it gives $]95,155[$

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3 years ago

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Given AABC ~ AFDE, what are the values of r and y?

mina [271]

9514 1404 393

Answer:

x = 4

y = 2

Step-by-step explanation:

The triangles being similar means the side ratios are the same.

AB/FD = BC/DE and AB/FD = CA/EF

12/3 = (3x+8)/5 and 12/3 = 28/(y+5)

Multiplying by 5, the first equation becomes ...

20 = 3x +8

12 = 3x . . . . . . subtract 8

4 = x . . . . . . . . divide by 3

Multiplying by (y+5)/4, the second equation becomes ...

y +5 = 28/4

y = 2 . . . . . . . . subtract 5

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3 years ago