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2 years ago

Simplify (-7x+5)-(2x^2-8x+6) in standard form

Mathematics

1 answer:

Zarrin [17]2 years ago

8 0

Answer: -2x² - 15x + 11

Step-by-step explanation:

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List all the multiples of 4 up to 20

emmainna [20.7K]

4 , 8 , 12 , 16 , 20

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3 years ago

Factor the expression using the GCF. The expression 21m−49n factored using the GCF is...

Roman55 [17]

Answer: 7(3m - 7n)

Step-by-step explanation:

Factor each term then see what value(s) they have in common:

21m - 49n

∧ ∧

3 · 7 · m 7 · 7 · n

Both terms have a 7 in common. What is left over after removing the 7?

21m: 7(3m)

49n: 7(7n)

GCF: 7 Leftovers: 3m and 7n

Factored form of expression is: 7(3m - 7n)

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3 years ago

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Us Find the area shaded in yellow. [ ? ] square units

ira [324]

Answer:

45 square units

Step-by-step explanation:

You can cut the yellow figure into a triangle (4 by 5) and a rectangle (7 by 5).

Using the formula $\frac{1}{2} *b*h$ and $l*w$ area formulas, we get:

$\frac{1}{2} *4*5+7*5=\\2*5+7*5=\\10+35=\\45$

The area shaded in yellow is 45 square units

6 0

3 years ago

Which expression is equivalent to 36÷3+3?

Igoryamba

Answer:

36÷6

Step-by-step explanation:

3+3 = 6

-kiniwih426

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3 years ago

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6n^2-30n+42 can someone help me

sesenic [268]

Answer:

$\frac{5+i\sqrt{3}}{2}}$

Step-by-step explanation:

I assume you want the roots. Here we go:

Use the quadratic formula: $\frac{-(-30) plus or minus \sqrt{(-30)^2-4(6)(42)} }{2\cdot6}$ .

The discriminant is 900 - 1008, or -108 (so we will need i, the complex number that means $\sqrt{-1}$ ).

This means on the top you get 30 + 6isqrt3 and on the bottom you get 12.

So the fraction is $\frac{30+6i\sqrt{3}}{12}=\boxed{\frac{5+i\sqrt{3}}{2}}.\blacksquare$

Note: This is just one of the roots, I am sure you can find the second one!

7 0

3 years ago