MATHEMATICS MIDDLE SCHOOL

You receive 9 text messages in 12 minutes. What is the rate of text messages per hour?

Answers

Answer 1

Answer:

Answer:

$45(messages)/(hour)$

Step-by-step explanation:

we know that

To find the rate of text messages per hour, first divide the total messages by the total time in minutes

$(9)/(12)=0.75(messages)/(minute)$

Convert to messages per hour

Remember that $1\ hour=60\ minutes$

Multiply by $60$

$0.75*60=45(messages)/(hour)$

Answer 2

Answer: 9 text messages in 12 min ⇒ how many text messages in 60 min
9×60÷12 = 45 text messages :))

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What is the formula to find a surface area? PLZ help I have homework

Answers

The surface area for a rectangular prism....

A= 2(wl+hl+hw)

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Which statement about the equation is true? 3 (4x – 2) = 12x

Answers

I hope this helps you

Well if u solve the equation u get -6

Ruby ate 1/3 of a pizza, and Angie ate 1/5 of the pizza. How much of the pizza did they eat in all?

Answers

Find common denominators. Multiply 5 to numerator and denominator of 1/3, and 3 to the numerator and denominator of 1/5

(1/3)(5/5) = 5/15

(1/5)(3/3) = 3/15

Add

5/15 + 3/15 = 8/15

Ruby and Angie ate 8/15 of the pizza.

hope this helps

i think it is 8/15 of the pizza

What is 15/10000 simplified

Answers

Let's break the problem down: what is a common factor of both of these numbers? 5. So, what do you multiply by five to get these numbers? 3x5=15 and 5x2000 is 10000. so, like Emsarj said, it is 3/2000

X squared minus 18x minus 144 equals 0. Solve by factoring.

Answers

x^2 - 18x - 144 = 0

Factorise:

We choose 2 numbers that add to -18, and multiply to 144, these numbers are +6 and -24, we put it into the brackets:

(x + 6)(x - 24) <- x = the interted sign of the numbers inside the brackets

E.g. +6 turns into -6 and -24 turns into +24

x must = -6 or = +24

Answer got deleted because I have to explain it better, which I will kindly do.
(x^2 - 18x - 144) = 0
What two factors add up to equal -18 AND multiply to equal -144?
For a product to be a negative, one of the factors have to be a positive, and the other has to be a negative (positive times a negative equals a negative).
And now that we know that, we know that the negative number has to be larger than the positive because of the -18.
What two factors add up to equal -18 AND multiply to equal -144?
Negative 24 and positive 6.
(x - 24)(x + 6)

Which one is greater 0.6 or 0.60

Answers

They are the same, because there's an invisible 0 next to 0.6.....

.6 and .60 are equal in the same way that 60 and 060 are equal -- The 0 is useless. More mathematically, .6 = six tenths or 6/10 and .60 = sixty hundredths or 60/100 and 6/10 is just a simplified version of 60/100.

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By what percent will a fraction change if its numerator is decreased by 50% and its denominator is decreased by 25%?(It's not 33%, 1/3%, or -33% btw)