All categories

3 years ago

I don’t know how to do this and I need know know how quick!!

Mathematics

1 answer:

4vir4ik [10]3 years ago

3 0

It is the Top left answer!

You might be interested in

Select the property that allows the statement (a + b) + c to be written as c + (a + b).

a_sh-v [17]

Commutative property allows you to change the order of an expression. Therefore, this expression is an example of commutative property.

7 0

2 years ago

Read 2 more answers

Jeff has $1.35 in nickles and dimes. He has a total of 15 coins. How many of each coin does he have?

dlinn [17]

For this case we propose a system of equations.

We know that a dime equals 10 cents and a nickel equals 5 cents.

So:

x: Let the variable that represents the number of dimes

y: Let the variable that represents the number of nickels

According to the statement we have:

$x + y = 15\\0.10x + 0.05y = 1.35$

We multiply the first equation by -0.10:

$-0.10x-0.10y = -1.5$

We have the following equivalent system:

$0.10x + 0.05y = 1.35\\-0.10x-0.10y = -1.5$

We add the equations:

$0.10x-0.10x + 0.05y-0.10y = 1.35-1.5\\-0.05y = -0.15\\y = \frac {-0.15} {- 0.05}\\y = 3$

So, Jeff has 3 nickels

$x + y = 15\\x + 3 = 15\\x = 15-3\\x = 12$

Jeff has 12 dimes.

Answer:

12 dimes and 3 nickels

4 0

3 years ago

18. When y = x?, which of the following expressions is<br> equivalent to -y ?

vitfil [10]

Answer:

-y=-x

The problem:

y=x then -y=?

Step-by-step explanation:

If y=x, then -y=-x.

Just like if u=9, then -u=-9.

Or, if -m=8, then m=-8.

5 0

3 years ago

Solve this problem <br> 7|8-3h|=21h-49

tatiyna

Answer:

h=5/2

Step-by-step explanation:

5 0

3 years ago

What’s the correct answer?

Sidana [21]

Convert 91% to a decimal:

$91 \div 100 = 0.91$

Multiply the amount of people by this decimal:

$1989 \times 0.91 = 1809.99$

Round the number to the nearest ones value:

1809.99

9 > 5

1809.99 -> 1810

1,810 people have reached the top of Mount Everest.

6 0

3 years ago

Read 2 more answers