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Alina [70]
3 years ago
15

How many solutions does this equation have? (15x + 21) / 3 = 5x + 7

Mathematics
1 answer:
Lesechka [4]3 years ago
7 0

Answer:

3*(5*x-7)-(15*x-21)=0

Step-by-step explanation:

3 • (5x - 7) -  (15x - 21)  = 0

Step  2  :

Equation at the end of step  2  :

 0  = 0

Step  3  :

Equations which are always true :

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|-1|+|0.8|<br> simplify the problem
DaniilM [7]

absolute value means always positive

|-1|+|0.8|

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3 years ago
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the ratio of children to adults is two to seven. there are 100 more adults than children. how many adults and children are in th
Alex Ar [27]

Answer: There are 140 adults and 40 children.

Step-by-step explanation:

Let 2x = Number of children

7x = Number of adults.

As there are 100 more adults than children.

That means, 7x-2x = 100

\Rightarrow\ 5x=100\\\\\Rightarrow\ x=\dfrac{100}{5}\\\\\Rightarrow\ x=20

Number of children =  2 (20)=40

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3 years ago
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Stels [109]

NOTE: I ACCIDENTALLY clicked one star. That DOES NOT count as a real rating, and this DOES NOT mean my answer is bad!

Answer:

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Step 3: -4 + (-37) + (-47) + (-3) + 7

Because the order was changed, it is the Commutative Property.

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3 years ago
HELPPP 100 POINTS!
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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

you have to multiply .79 to both a and 1.2. A is wrong because it's saying we need to multiply .79 to 1.2lb. which is the weight of oranges and the total cost of apples and oranges which is 6.27.

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