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4 years ago

What expression is equivalent to 121x2-64y

Mathematics

1 answer:

jarptica [38.1K]4 years ago

6 0

A is equivalent, as multiplying 2 negatives would produce a positive. Multiplying a positive and a negative get you a negative.

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The product of two consecutive even numbers is 12 more than the square of the smaller number.

vivado [14]

Answer:

6 and 8

Step-by-step explanation:

Let's start off by thinking at what the question is asking us.

The product (multiplication) of two even numbers (x)(x+2) is which means =,

12 more (12) than the square of the smaller number (x).

So put that all together and you get (x)(x+2)=12+x^2=

Distribute the x, (x)(x+2)=

x^2+2x=x^2+12 Subtract x^2 from both sides.

2x=12

Divide both sides by 2 and you get x=6

So the two numbers are 6,8

6(8)=12+6^2

48=48

6 0

3 years ago

A piano teacher has 4 1/2 hours available to teach a night each lesson will last 1 1/2 hours how many lessons can the teacher sc

pav-90 [236]

Answer:

She could teach 3 lessons a night

Step-by-step explanation:

Because 1 1/2 goes into 4 1/2 3 times

7 0

3 years ago

A certain four-cylinder combination lock has 50 numbers on it. to open it, you turn to a number on the first cylinder, then t

kumpel [21]

A certain four-cylinder combination lock has 50 numbers on it.

It is a four cylinder combination lock

Each cylinder has 50 numbers

So we have to choose 4 numbers for 4 cylinders

_____ , ______ , ______, _____

you turn to a number on the first cylinder

We have 50 numbers so we have 50 combinations

__50___ , ______ , ______, _____

Repetitions are allowed so we do the same for remaining three

50 , 50 , 50 , 50

50 * 50 * 50* 50 = 6250000

There are 6250000 different lock combinations .

7 0

3 years ago

Read 2 more answers

The expression -310 + 15m represents a submarine that began at a depth of 310 feet below sea level and ascended at a rate of 15

Lesechka [4]

Answer:

190 feet below sea level

Step-by-step explanation:

d = -310 + 15m

d = -310 + 15(8)

d = -310 + 120

d = -190

4 0

3 years ago

1 1/2 pounds of milk is how many cups?

inna [77]

Answer:

$2\frac{5}{8}$ cups

Step-by-step explanation:

1 pound = 1 3/4 cups
1/2 pound = 7/8 cups
1 3/4 + 7/8 = 21/8
21/8 = 2 5/8

I hope this helps!

4 0

3 years ago