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djverab [1.8K]
3 years ago
15

Two thirds plus a number plus 4 is 7

Mathematics
2 answers:
Reika [66]3 years ago
7 0
9/2 is the answer


7-4= 3
3times 3/2 is 9/2
Nitella [24]3 years ago
6 0

Answer:

The answer is \frac{7}{3}

Step-by-step explanation:

In order to determine the answer, we have to express the statement to a algebraic expression.

The "two thirds" means \frac{2}{3}.

Then "plus a number" means +x. "x" is the variable that we want to know its value.

Then "plus 4" means +4.

So, the algebraic expression is:

\frac{2}{3}+x+4=7

Then, we have to solve for "x". We free this variable in any side of the equation:

x=-\frac{2}{3}+7-4\\x=\frac{-2+9}{3}\\x=\frac{7}{3}\\

Finally, the "x" value is \frac{7}{3}

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Answer:

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Step-by-step explanation:

3 x 10 is 30

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7 0
3 years ago
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Matt is showing his work in simplifying (6.2 − 1.6) − 4.4 + 7.8. Identify any error in his work or reasoning. Step 1: (6.2 − 1.6
Black_prince [1.1K]

Answer:

The correct option is (d)-He wrote commutative instead of associative in Step 2.

Step-by-step explanation:

Commutative property: a+b=b+a

Associative property: (a+b)+c=a+(b+c)

Now consider the provided expression.

(6.2 − 1.6) − 4.4 + 7.8

Step 1

(6.2 − 1.6) − 4.4 + 7.8

Step 2 Use Associative property

6.2 + (−1.6 − 4.4) + 7.8

Step 3: Simplify

6.2 − 6 + 7.8

Step 4: Use commutative property

14 − 6

Step 5: Simplify

14 − 6 = 8

Hence, the wrong step is step 2. He wrote commutative instead of associative in Step 2.

Therefore, the correct option is (d)-He wrote commutative instead of associative in Step 2.

8 0
4 years ago
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3 years ago
Evaluate if a= 28 and b= -3 a/4+b
patriot [66]

Answer:

4

Step-by-step explanation:

divide the numbers


subtract the numbers


final answer:
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8 0
2 years ago
If 3a - 2 = 10, what is the value of 8a + 1?
crimeas [40]

Answer:

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Step-by-step explanation:

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3 years ago
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