Question

Yi ting weighs 8.3 kg.her older brother is 4 time as heavy as her how much does her older brother weigh in kilograms

Answer 1

The weight of the Yi ting’s older brother is $\fbox{\bf33.2kg}$.

Further explanation:

Given:

The weight of the Yi ting is 8.3kg and weight of her older brother is 4 times more than her weight.

Calculation:

Consider the weight of the Yi ting as $x$ and weight of Yi ting’s older brother as $y$.

Since, the weight of the Yi ting’s older brother $y$ is 4 times more than the weight of Yi ting $x$, it can be written as follows:

$y=4x$                                                  …… (1)

Now, substitute 8.3 for x in equation (1).

$\begin{aligned}y&=4\left({8.3}\right)\\&=33.2\\\end{aligned}$

Thus, the weight of the Yi ting’s older brother is $\fbox{\bf33.2kg}$.  

Learn more:  

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Answer Details :

Grade: Middle School

Subject: Mathematics

Chapter: linear equation

Keywords:

Kilogram, Yi ting, weight, Yi ting’s older brother, y=4x, 8.3 kg, four times, function, substitution, direct substitution, elimination, graph, middle term factorization, scientific notation.

Answer 2

8.3 times 4=33.2. So I would say 33.2 as my answer because 4 times = 4x. In this case x is equal to 8.3. (in math words: 8.3 x 4 = 33.2 kg) Hope this helps!