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KonstantinChe [14]
3 years ago
7

Multiplying polynomials (3m-1)(8m+7)

Mathematics
2 answers:
shtirl [24]3 years ago
6 0
(3m -1)(8m + 7)

= {3m(8m + 7)} - {1(8m+7)}

= 24m² + 21m - 8m+ 7

= 24m² + 13m - 7

Zolol [24]3 years ago
3 0
(3m-1)(8m+7)=3m\cdot 8m+3m\cdot 7-1\cdot 8m-1\cdot 7=\\ \\=24m^2+21m-8m-7=24m^2+13m-7


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Can someone please help with #16
ollegr [7]

Answer:

∠ WZX = 50°

XW is not an altitude.

Step-by-step explanation:

16. See the attached figure.

XW is the angle bisector of ∠ YXZ, hence, ∠ WXY = ∠ WXZ

Now, given that ∠ YXZ = 8x + 34 and ∠ WXY = 10x - 13

Hence, ∠ YXZ = 2 ∠ WXY

⇒ 8x + 34 = 2(10x - 13)

⇒ 8x + 34 = 20x - 26

⇒ 12x = 60

⇒ x = 5.

Hence, ∠ XZY = ∠ WZX = 10x = 50° (Answer)

Now, ∠ WXZ = ∠ WXY = 10x - 13 = 37°

Hence, from Δ WXZ,

∠ WZX + ∠ WXZ + ∠ XWZ = 180°

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⇒ ∠ XWZ = 93° ≠ 90°

Hence, XW is not an altitude. (Answer)

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3 years ago
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Fiesta28 [93]

Answer:

Step-by-step explanation:

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Blizzard [7]

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The answer for #22 is (D).

#23. We can use a proportion:

(The shaded area)/(entire circle area) = (360 - 60)/360

But, we don’t have to find the areas of the region and circle; we can just solve the fraction:

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What is the equation of the line that contains point ( -2,1) and has a slope of 4
marshall27 [118]

Answer:

y=4x+7

Step-by-step explanation:

it's in the picture

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3 years ago
What is 7/2 divided by 49/4?
ruslelena [56]

Answer:

\frac{2}{7}

Step-by-step explanation:

\frac{7}{2} ÷ \frac{49}{4} needs to be flipped and multiplied.

It will become \frac{7}{2} · \frac{4}{49}.

Simplify the fractions by replacing 7 with 1 and 49 with 7, since 7 is 1/7 of 49. Then, turn the 2 into a 1 and the 4 into a 2, since 2 is half of 4.

You will be left with 1 · \frac{2}{7}, which equals \frac{2}{7}

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3 years ago
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