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Sati [7]
3 years ago
8

7x+9-13x+4 simplified

Mathematics
1 answer:
densk [106]3 years ago
6 0

Answer:

-6x+13

Step-by-step explanation:

7x+9-13x+4

7x-13x+9+4

-6x+9+4

-6x+13

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Find the value of x and y so that both proportions will be correct:
andrew11 [14]

The values of x and y are 0.2 and 0.4 respectively.

<em><u>Explanation</u></em>

The given proportions are.....

x: 1\frac{2}{3}=y: 3\frac{1}{3} and y:1.5=0.2:0.75

From the second proportion, we will get....

y:1.5=0.2:0.75\\ \\ \frac{y}{1.5}=\frac{0.2}{0.75} \\ \\ 0.75y=0.2*1.5\\ \\ 0.75y=0.3\\ \\ y=\frac{0.3}{0.75}=0.4

Now, we will plug this y=0.4 into the first proportion. So we will get....

x: 1\frac{2}{3}=y: 3\frac{1}{3}\\ \\ x: \frac{5}{3}=0.4:\frac{10}{3} \\ \\ \frac{x}{\frac{5}{3}}= \frac{0.4}{\frac{10}{3}}\\ \\ \frac{3x}{5}=\frac{1.2}{10}\\ \\ 30x=6\\ \\ x= \frac{6}{30}=0.2

So, the values of x and y are 0.2 and 0.4 respectively.

6 0
3 years ago
12÷3×15(15-6)+3.use order of operations to solve
dlinn [17]
12/3=4
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Step-by-step explanation:

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Write 5,400,300 in standard form - help!
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Hello,


This number is already in stranded form.

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Hope this helps a bit.


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