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3 years ago

Can somebody help me with number 7? Please explain as well! :)

Mathematics

1 answer:

gayaneshka [121]3 years ago

4 0

To factor number 7 :
3x^2-12
3x^2+3×-4
3*1, -4:2*-2
3(x^2-2^2)
use difference of square formula ((a^2+b^2=(a+b)(a-b))
3(x+2)(x-2)

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Answer:

The best correct option is C

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Step-by-step explanation:

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2 years ago

Mr Wallace sells appliances in receives a weekly salary of $275 plus a 3% Commission on all of his self last week is sells total

Greeley [361]

Answer:

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Step-by-step explanation:

Given as :

The fixed weekly salary of Mr Wallace = $275

And The commission of 3% on his total sell

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I.e 3% of total sells amount = 3% of $1179 = .03 × $1179 = $35.37

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3 years ago

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Rashid [163]

Answer:

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3 0

2 years ago

Read 2 more answers

What is the radius of the circle given by the equation below?

grandymaker [24]

$x^2+18x+y^2+18y=-146 \\ \\( x^2+18x + 81)+(y^2+18y+81)-81-81=-146\\ \\(x+9)^2+(y+9)^2=-146+81+81\\ \\(x+9)^2+(y+9)^2=-146+162\\ \\(x+9)^2+(y+9)^2=16$

$This \ is \ in \ the \ general \ circle \ form : (x-h)^ 2+ (y-k)^2 = r^2, so: \\ \\ r^2=16 \\ \\r=\sqrt{16}\\ \\r=4 \\ \\ Answer : \ C. 4$

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Step-by-step explanation:

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2 years ago