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3 years ago

Write an equivalent expression using the associative property 7 + (3 + 8)

Mathematics

2 answers:

serg [7]3 years ago

7 0

(7+3)+8
Hope this helps:)

tatyana61 [14]3 years ago

4 0

Answer:

(7+3)+8

Step-by-step explanation:

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Hello! I'm having a really hard time solving this by Elimination and could really use some help

Mamont248 [21]

Answer:

x= 3, y=0, z= 1

Step-by-step explanation:

Let's label the 3 given equations first.

2x +3y +4z= 10 -----(1)

3x +2y -4z= 5 -----(2)

x +4y +2z= 5 -----(3)

(1) +(2):

This is to eliminate the z term.

2x +3y +4z +3x +2y -4z= 10 +5

5x +5y= 15

Divide by 5 on both sides:

x +y= 3 -----(4)

(3) ×2:

2x +8y +4z= 10 -----(5)

(2) +(5):

This is to eliminate z term.

3x +2y -4z + 2x +8y +4z= 5 +10

5x +10y= 15

Divide by 5 throughout.

x +2y= 3 -----(6)

(6) -(4):

x +2y -(x +y)= 3 -3

x +2y -x -y= 0

y= 0

subst. y=0 into (4):

x +0= 3

x= 3

subst. x=3, y=0 into (3):

3 +4(0) +2z= 5

3 +2z= 5

2z= 5 -3

2z= 2

z= 2÷2

z= 1

6 0

3 years ago

At a time denoted as t = 0 a technological innovation is introduced into a community that has a fixed population of n people. De

ehidna [41]

N = number of people = constant

number of people who have adopted the new technology: x(t) = x

number of people who have not adopted the new technology: n - x

proportionality constant: k

dx / dt = kx(1-x)

x(0) = 0 (this is at t = 0, 0 people have adopted the new technology)

5 0

4 years ago

Convert the measurement as indicated 53qt = __ gal __ qt

NemiM [27]

13 gal 1 qt

There are 4 qts in a gal. Because of this, you can find the number of gal in a qt by dividing the qt by 4:

53/4=13.25

5 0

4 years ago

Gail took part in a quiz show and won half a million pounds she spends 120000 pounds on a sports car. Then spends half of the mo

Shalnov [3]

Answer: 190,000 pounds

Step-by-step explanation:

Amount won by Gail= 500,000

Amount spent on sports car= 120,000

Money left = Amount won minus amount spent on sports car

= 500,000 - 120,000

= 380,000

Then she spends half of the amount left on her apartment

= 1/2 of 380,000

= 1/2 × 380,000

= 190,000

Her apartment costs 190,000 pounds

6 0

3 years ago

Read 2 more answers

What is 2 times 2/6?

Aloiza [94]

Hi there!

I can see why you've posted a question like this here - For adding, subtracting, multiplying, or dividing fractions by whole numbers can be difficult to come out with a precise answer, so let me make it look easier for you!

So, the steps are:

Smush the 2 (whole number) and the 2 (the numerator of the fraction) together on top so its (2)(2) over 6. I can show you what I mean, if you'd like.

$\frac{(2)(2)}{6}$ This is what it should look like.

Now, what is 2 times 2? You can use a calculator for this part.

$2 *2 = 4$

Now, we can get to the last part, my favorite one!

Simplify $\frac{4}{6}$ down to $\frac{2}{3}$ .

How did we do it? EASY!

See what number does evenly into both numerators and denominators. In this case, 2 goes into 4 twice, and 2 goes into 6 three times, so we're left with our beautiful answer $\frac{2}{3}$ .

That wasn't so bad, was it? You can use this as a guide for figuring out math problems like these, in case you're stuck again. But just in case, message me if you need anymore help! :D

4 0

3 years ago

Read 2 more answers