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2 years ago

5xy + 7x + 6x - xy Please help

Mathematics

1 answer:

lilavasa [31]2 years ago

8 0

Answer:

4xy+13x

Step-by-step explanation:

5xy+7x+6x-xy

5xy-xy=4xy

7x+6x=13x

5xy+7x+6x-xy=4xy+13x

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Which expression is equivalent to 7/2h - 3 (5h - 1/2)

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7/2h-3/2step-by-step

explicacion: 7/2h-3=37/2h5h

1/2= 3/2Expression made:37/2h 3/2

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How many ninths in 2/3

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6/9 is in 2/3 all you do is multiply numerator and denominator by 3

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3 years ago

Read 2 more answers

The following are the ages (years) of 5 people in a room:

slava [35]

Answer:

The age of the person who entered the room is 15

Step-by-step explanation:

We are given:

Ages of 5 people in a room are:

17, 16, 15, 17, 22

A person enters room, and then the mean age of 6 people is 17.

We need to find the age of person who entered the room.

The formula to calculate mean is: $Mean=\frac{Sum\:of\:all\:data\:values}{Number\:of\:data\:Values}$

Now, in question we are given mean of 6 people that is 17

The age of 5 people are given while age of one person who enters the room is unknown.

Let age of person whose age is unknown= x

Now finding x using mean formula

$Mean=\frac{Sum\:of\:all\:data\:values}{Number\:of\:data\:Values}\\17=\frac{17+16+ 15+ 17+ 22+x}{6}\\17=\frac{87+x}{6}\\17*6=87+x\\102=87+x\\x=102-87\\x=15$

So, The value of x: x=15

Hence, the age of the person who entered the room is 15

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2 years ago

The triangles shown are congruent which of the following must be true

Fantom [35]

The bottom answer m y = m h

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3 years ago

A food service in the mall prepares free samples of chicken to give out during dinner time. One hour later, the food service has

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The food service gave out 80 samples, which is 4 fewer than 70% of the total number of samples they prepared. Lets make x the total number of samples they prepared.

So lets write it as an equation

80 = (70% of x) -4

70% converts to a decimal by moving the decimal point 2 spaces up, so it is 0.7

80 = 0.7x-4

Add 4 to both sides of the equation

84 = 0.7x

Divide both sides by 0.7 to isolate the x

x = 120

The food service prepared 120 samples.

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2 years ago