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3 years ago

What is x in this equation 7(x-3)=28

Mathematics

2 answers:

andrezito [222]3 years ago

6 0

Answer:

Step-by-step explanation:

barxatty [35]3 years ago

6 0

Answer:

7 is correct answer

Step-by-step explanation:

$7(x - 3) = 28 \\ 7x - 21 = 28 \\ 7x = 28 + 21 \\ 7x = 49 \\ x = \frac{49}{7} \\ x = 7$

hope it helped you:)

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Which expression is equivalent to (7x+9y)2

Arada [10]

Answer:

$49x^2+126xy+81y^2$

Step-by-step explanation:

Use the square of a binomial theorem

$(a+b)^2$ = $a^2+2ab+b^2$

Now expand the given equation:

$(7x+9y)^2=49x^2+126xy+81y^2$

Hope this helps :)

Have a great day!

6 0

3 years ago

Solve this equation 4y+228=352

statuscvo [17]

4y + 228 = 352

4y = 352 - 228

4y = 124
--- ----
4 4

------------
| y = 31 |
------------

hope this helps

8 0

3 years ago

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forsale [732]

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3 years ago

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8 0

3 years ago

Read 2 more answers

What is the slope y+2=1/4(x-3)

ioda

Answer:

$m=\frac{1}{4}$

Step-by-step explanation:

Given

$y+2=\frac{1}{4}(x-3)$

Required

Find the slope

$y+2=\frac{1}{4}(x-3)$

Subtract 2 from both sides

$y+2-2=\frac{1}{4}(x-3) - 2$

$y=\frac{1}{4}(x-3) - 2$

Open bracket

$y=\frac{1}{4}x-\frac{1}{4}*3 - 2$

$y=\frac{1}{4}x-\frac{3}{4} - 2$

Take LCM

$y=\frac{1}{4}x+\frac{-3 - 8}{4}$

$y=\frac{1}{4}x+\frac{-11}{4}$

$y=\frac{1}{4}x-\frac{11}{4}$

An equation has the form:

$y = mx + b$

Where

$m = slope$

By comparing: $y = mx + b$ and $y=\frac{1}{4}x-\frac{11}{4}$

$m=\frac{1}{4}$

<em>So, the slope is 1/4</em>

6 0

3 years ago