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emmainna [20.7K]
3 years ago
7

Please help i will mark brainiest!

Mathematics
1 answer:
Daniel [21]3 years ago
6 0

The correct answer is 11/30

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Please Help !! <br>The picture of the question is attached. ​
kirza4 [7]

Answer:

x = 90°

Step-by-step explanation:

Using the identity

cos²x = 1 - sin²x

Given

cos²x - sin x + 1 = 0

1 - sin²x - sin x + 1 = 0

- sin²x - sin x + 2 = 0 ← quadratic equation in sin x ( multiply through by - 1 )

sin²x + sin x - 2 = 0 ← in standard form

(sinx + 2)(sinx - 1) = 0 ← in factored form

Equate each factor to zero and solve for x

sinx + 2 = 0 ⇒ sinx = - 2 ← has no solution as - 1 ≤ x ≤ 1

sinx - 1 = 0 ⇒ sinx = 1 ⇒ x = 90°

solution is x = 90°

3 0
3 years ago
What is the square root of 852
elena55 [62]

Answer:

2 sqrt of 218

6 0
3 years ago
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Can you please help me!
Burka [1]

Answer:

x=20

Step-by-step explanation:

3x - 10 + 5x + 30 = 180

8x + 20 = 180

8x = 160

x = 160/8

x = 20

check:

3(20) - 10 + 5(20) + 30 = 180

60 - 10 + 100 + 30 = 180

50 + 100 + 30 = 180

150 + 30 = 180

180 = 180 ✓

7 0
3 years ago
Which of the following represents the graph of f(x) = 2(x + 3)?
Vinvika [58]
We have that
the correct expression is
y=2^(x+3)

using a graph tool
see the attached figure

the answer is the option C

8 0
3 years ago
Can you tell me what 4 2/5 is as a fraction with dollar and cents sign?
amid [387]
$4.40 cents would be ur answer...
5 0
4 years ago
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