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3 years ago

Simplify (8x^2 - 1 + 2x^3) - (7x^3 - 3x^2 + 1).

Mathematics

1 answer:

Elenna [48]3 years ago

7 0

Answer:

31x^2-2 is the answer....

Step-by-step explanation:

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Find the measure of ∠C if ∠A = 3 2 x + 20 ∠B = 7 2 x + 20 ∠C = 5 2 x + 40 ∠D = 3 2 x + 10 A) 65° B) 76° C) 95° D) 115°

Rudiy27

The sum of the angles of a quadrilateral is 360°.
$\left(\dfrac{3}{2}x+20\right)+\left(\dfrac{7}{2}x+20\right)+\left(\dfrac{5}{2}x+40\right)+\left(\dfrac{3}{2}x+10\right)=360\\\\9x+90=360\\\\x=\dfrac{270}{9}=30$

Given that x=30, the measure of ∠C is
∠C = (5/2)×30 +40 = 115

The appropriate choice is ...
D) 115°

5 0

3 years ago

Read 2 more answers

40 points. Factor the following polynomial.

madam [21]

Answer:

Step-by-step explanation:

49y² - x² ← is a difference of squares and factors in general as

a² - b² = (a - b)(a + b) , then

49y² - x²

= (7y)² - x²

= (7y - x )(7y + x) → A

3 0

2 years ago

Simplify: 2cd3(c − d + 5)

maw [93]

Answer:

Step-by-step explanation:

I used an Algebra app :) it is correct.

8 0

3 years ago

Suppose y varies directly with x. Write a direct variation equation that relates x and y.

timama [110]

$\huge\mathfrak\purple{Answer:-}$

★ Option (A) y = -5x is the right answer.

<h3>I hope this helps! :)</h3>

8 0

3 years ago

Lucas made the list of all his assets and liabilities below. Highlight each item in

KonstantinChe [14]

Answer:

I got 12,148. Is that an option?

Step-by-step explanation:

98.00 checking account

car (value - outstanding balance) 12,500

plus jewelry $1750

4 0

3 years ago