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3 years ago

Work out the value of 4(2x+3y) when x=8 and y=-3

Mathematics

2 answers:

timofeeve [1]3 years ago

8 0

I think it may be 28.

Sav [38]3 years ago

3 0

Here’s the steps if you need it. And yes, the answer is 28.

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3 years ago

Which equation shows a y- intercept of -5

Assoli18 [71]

Hi there!

»»————-　★　————-««

I believe your answer is:

Option B) $y=x-5$

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Here’s why:

Most options (Second, Third, and Fourth) are in slope intercept form.

⸻⸻⸻⸻

$\boxed{\text{Slope-Intercept Form}}\\\\y=mx + b\\\\\boxed{\text{Key:}}\\\\m - \text{The Slope}\\\\b- \text{The Y-Intercept}$

⸻⸻⸻⸻

We are looking for the equation where '-5' is in b's place.

⸻⸻⸻⸻

$\boxed{\text{Which equation shows a y-intercept of -5?}}\\\\---------\\\text{A}) -5y = x\\\\\text{This equation in slope-intercept form is }y=\frac{1}{5}x.\\\\\text{The 'b' part is not shown. This means that the line passes through the}\\\text{origin.}\\\\---------\\\\\text{B})\text{ }y = x-5\\\\\text{This option shows a slope of one and a y-intercept of -5.} \\\\\text{Therefore, \boxed{\text{option B is the correct answer.}}}\\\\----------\\\text{Option C has a y-intercept of 5, and Option D has a}\\$

$\text{y-intercept of 1.}$

⸻⸻⸻⸻

»»————-　★　————-««

Hope this helps you. I apologize if it’s incorrect.

8 0

3 years ago