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Bezzdna [24]
3 years ago
7

Which choice describes an equation

Mathematics
1 answer:
Sladkaya [172]3 years ago
6 0

Answer:

Step-by-step explanation:

Remark

Choose any number at all and see what happens.

Suppose x = 8

3*(8 + 1) = 3*8 + 3

3(9) = 27

3*8 + 3 = 24 + 3 = 27

What you have shown is that the second choice is incorrect. There is at least one value that makes the equation correct (that is, both sides come to the same result.)

If choice two is false then choice one must be true since these results may give the only 2 possible results.

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15 Point award! :)
NISA [10]
We can solve this question easiest by putting it as 2 equations.

First, well put the original equation, 2c+5b=55,000. B stands for the cost of backyard pool weddings and c stands for the cost of carribean weddings.

We got this equation because the question states that there were 2 carribean weddings and 5 pool weddings, and the amount of money obtained was $55,000 total as a result.

Now, we’ll put the extra information into an equation, c-10,000=b. We got this equation because it clearly states that backyard pool weddings cost 10,000 less than Caribbean, so c-10,000=b.
Now, we have to solve. Since the first equation has 2 variables, it is unsolvable. This is where the second equation comes in. We can rewrite c-10,000=b as b+10,000=c.

Now, since b+10,000=c, substitute b+10,000 for c in the first equation.
The result is 2(b+10,000)+5b=55,000.
Now that we only have one variable in the equation, it is solvable.
20,000+7b=55,000
7b=55,000
B=7,857
Now to solve for c, insert 7,857 for b in the second equation.
7,857+10,000=c
17,857=c
The cost of carribean weddings was $17,857.
The cost of a backyard pool wedding was $7,857.
Hope this helps!
4 0
4 years ago
they've invested to earn $20 in a savings account that offer 3% return on the investment the value of david's investment will be
Firlakuza [10]
I=PRT
P=present amount
R=rate
T=time
basically
20+interest<u /> is more than or equal to 400
20+I<u>></u>400
minus 20 both sides
I<u>></u>380

solve
P=20
R=3%=0.03
T=?
I=PRT
380<u><</u>I=PRT
380<u><</u>20(0.03)(T)
380<u><</u>0.6T
divide both sides by 0.6
633.33333<u><</u>T
633.33 years at least

6 0
3 years ago
What single decimal multiplier would you use to decrease by 3% followed by a 6% increase?
Charra [1.4K]

Answer:

1.0282

Step-by-step explanation:

The multiplier for a increase of a% is 1 + a/100.

The multiplier for a decrease of b% is 1 - b/100.

Decrease of 3% followed by a 6% increase:

Calculate each multiplier, and then multiply then:

Decrease 3%: 1 - (3)/100 = 0.97

Increase 6%: 1 + (6)/100 = 1.06

0.97*1.06 = 1.0282

The answer is 1.0282

6 0
3 years ago
SOMEONE, PLEASE HELP, I NEED THE ANSWER NOW
faltersainse [42]
3. -155.15
4. -140.95
5. -1.40
6. 5.80
I’m not 100% sure but I think it’s right
8 0
3 years ago
5
PilotLPTM [1.2K]

Answer:

sxhhxhxbxhdgcgg her izisjsuhdhdhdhsy ne zaman emekli olabilirim ama diğerlerini

4 0
3 years ago
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