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3 years ago

Please help. I don't understand

Mathematics

1 answer:

GaryK [48]3 years ago

6 0

9514 1404 393

Answer:

8m³ -4m² +3m

Step-by-step explanation:

The perimeter of a triangle is the sum of the lengths of its three sides. Here, you're given the perimeter and two of the sides. The third side will be the length that makes up the difference.

P = side 1 + side 2 + side 3

18m³ +2m² -m = (5m³ +3m² -2m) +(5m³ +3m² -2m) + side 3

18m³ +2m² -m = (10m³ +6m² -4m) + side 3 . . . . . collect terms

18m³ +2m² -m - (10m³ +6m² -4m) = side 3 . . . . . subtract (10m³ +6m² -4m)

m³(18 -10) +m²(2 -6) +m(-1 +4) = side 3 . . . . . . . . . group like terms

8m³ -4m² +3m = side 3

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Write a quadratic function in standard form with zeros 9 and -4

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3 years ago

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Sergeeva-Olga [200]

Answer: AB will be parallel to A'B'.

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3 years ago

Read 2 more answers

Verify and show work<br><br> csc x - cos x • cot x = sin x

Vladimir79 [104]

Answer: The answer is (d) ⇒ cscx = √3

Step-by-step explanation:

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∴ sinx + cos²x/sinx = √3

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∴ sinx + (1 - sin²x)/sinx = √3 ⇒ make L.C.M

∴ (sin²x + 1 - sin²x)/sinx = √3

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2 years ago

Given triangle PRS is congruent to triangle CFH, find the values of x, y, and z.

Mashutka [201]

Answer:

x = 23

y = 7

z = 11

Step-by-step explanation:

Since ∆PRS ≅ ∆CFH, therefore,

m<R = m<F

13y - 1 = 90° (substitution)

Add 1 to both sides

13y - 1 + 1 = 90 + 1

13y = 91

Divide both sides by 13

13y/13 = 91/13

y = 7

Since ∆PRS ≅ ∆CFH, therefore,

PS = CH

2x - 7 = 39 (substitution)

Add 7 to both sides

2x - 7 + 7 = 39 + 7

2x = 46

Divide both sides by 2

2x/2 = 46/2

x = 23

Since ∆PRS ≅ ∆CFH, therefore,

m<S = m<H

Find m<S

m<S = 180 - (m<P + m<R) (sum of ∆)

m<S = 180 - (28 + (13y - 1)) (substitution)

Plug in the value of y

m<S = 180 - (28 + (13)(7) - 1))

m<S = 180 - (28 + 91 - 1)

m<S = 180 - 118

m<S = 62°

Therefore, since m<S = m<H,

62° = 6z - 4 (substitution)

Add 4 to both sides

62 + 4 = 6z - 4 + 4

66 = 6z

Divide both sides by 6

66/6 = 6z/6

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3 years ago

A fireworks display is launched from a platform 10 feet above ground with an initial upward velocity of 70 feet per second. The

Lena [83]

Answer: A. 87 feet

Step-by-step explanation:

1. You can find the t value of the vertex of the parabola as following:

$t=-\frac{b}{2a}$

2. Substitute values:

a=-16

b=70

Then:

$t=-\frac{70}{2(-16}$

$t=2.18$

3. Substitute the vaue obtained into the equation given in the problem. Therefore, you obtain the following result:

$h=-16t^{2}+70t+10\\h=-16(2.18)^{2}+70(2.18)+10\\h=86.56$

4. To the nearest foot:

h=87 feet

6 0

3 years ago

Please help. I don't understand​

Please help. I don't understand