2 years ago

) Write an expression that is equivalent to 3(7 + x).

Mathematics

2 answers:

makvit [3.9K]2 years ago

7 0

3( 7 + x ) = 21 + 3x

..................................

Mamont248 [21]2 years ago

4 0

same question how many times...?

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Two fewer than a number doubled is the same as the number decreased by 38. if n is "the number," which equation could be used to

Alona [7]

$\displaystyle \\ 
\text{We use the following equation:} \\ \\ 
 \frac{n}{2} = n - 38 \\ \\ 
We solve for n: \\ \\ 
 \frac{n}{2} = n - 38 ~~\Big| \times 2 \\ \\ 
n = 2 \times n - 2 \times 38 \\ \\ 
n = 2n - 76 \\ \\ 
2n - n = 76 \\ \\ 
\boxed{n = 76} \\ \\ 
\text{Verification: } \\ \\ 
\frac{n}{2} = n - 38 \\ \\ 
\frac{76}{2} = 76 - 38 \\ \\ 
\boxed{38 = 38 ~~~ Correct }$

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3 years ago

Caroline, Krutika and Natasha share some sweets in the ratio 1:2:4. Caroline gets 14 sweets.

lisov135 [29]

Answer:

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Step-by-step explanation:

Caroline got 14 sweets, ratio for her was 1.

Krutika had twice the bigger ratio than her, which means you have to multipy Carolines' sweets by 2. -> 14*2= 28

And do the same thing for Natasha which gives us the result of 56. 14*4= 56

And finally, you add all of those together and get 14+28+56=98.

Hope I helped! :)

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2 years ago

What is the 2nd equivalent fraction to 1/7?

aksik [14]

Answer: 2/14; 3/21; 4/28

Step-by-step explanation:

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MArishka [77]

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Step-by-step explanation:

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3 years ago

What is the value of y

guajiro [1.7K]

Answer:

Step-by-step explanation:

From Thales' theorem:

$\dfrac y7\ =\ \dfrac45\\\\y=\dfrac45\cdot7\\\\y = \dfrac{28}5\\\\y = 5.6$

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3 years ago