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WITCHER [35]
4 years ago
5

Find and correct the error of the following factor.

Mathematics
1 answer:
pshichka [43]4 years ago
3 0

3x² + xy2 – 3xy-y? >> 3x² - xy - y

line 1: = (3x² + xy2)+(-3xy – y?)

ANS 3x² - xy - y 《Correct》

line 2: = x(3x + y2) - y(3x – y2)

ANS 3x² - xy +2y²

line 3: = (x-y) (3x +y?)

ANS 3x² - 2xy - y²

If it incorrect, I'm sorry.

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5. Find the measures of the following. Round to the nearest whole number. (2 points)
chubhunter [2.5K]

Answer:

HT = 17 cm

<T = 58°

<H = 32°

Step-by-step explanation:

✔️Find HT:

Since it's a right triangle, we would apply the Pythagorean Theorem given as c² = a² + b²

Where,

a = HW = 15 cm

b = WT = 8 cm

c = HT

Plug in the values:

HT² = 15² + 8²

HT² = 289

HT = √289

HT = 17 cm

✔️Find <T by applying trigonometric ratio formula:

Recall: SOH CAH TOA

Reference angle (θ) = <T

HW = 15 cm = Opposite side length

WT = 8 cm = Adjacent side length

Apply CAH:

Cos θ = Adj/Hyp

Substitute

Cos T = 8/15

T = cos^{-1}(0.5333)

T ≈ 58°

✔️Find <H:

Sun of interior angles of a triangle = 180°

Therefore,

m<H + m<T + m<W = 180°

Substitute

m<H + 58° + 90° = 180°

m<H + 148° = 180°

m<H = 180° - 148°

m<H = 32°

4 0
3 years ago
Find the the solution of this system of equations -7x-6y=59 -8x-6y=58
serg [7]
Hello : 
<span> -7x-6y=59...(1)
 -8x-6y=58...(2) 
(1)-(2) : x = 1 
subsct in (1) 
-7-6y = 59
6y =-66
y = -11

</span>
6 0
3 years ago
What's the value of w and x
Pepsi [2]

Answer:

Both A and B

Step-by-step explanation:

sum of opposite interior angles is equal to the exterior angle.

6 0
3 years ago
If you place a 39-foot ladder against the top of a 34-foot building, how many feet will
netineya [11]

Answer: 19.1ft

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
PLZ HELP!<br>dont just answer something random for points:)tysm​
sergiy2304 [10]

Answer:

4(x^{2} -4)^{2} -76

Step-by-step explanation:

Take out 4:

4(x^2-8x)-12

=4(x^2-8x+16-16)-12

=4(x^2-8x+16)-64-12

=4(x^2-4)^2 - 76

=4(x^{2} -4)^{2} -76

6 0
3 years ago
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