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MArishka [77]
3 years ago
15

Pls help !Use a special right triangle to find the exact cosine of a 30° angle.​

Mathematics
1 answer:
julia-pushkina [17]3 years ago
4 0

Answer:

that should be 95 degree

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Why is the value of q?
Rudiy27

Given:

QSR is a right triangle.

QT = 10

TR = 4

To find:

The value of q.

Solution:

Hypotenuse of QSR = QT + TR

                                 = 10 + 4

                                 = 14

Geometric mean of similar right triangle formula:

$\frac{\text { hypotenuse }}{\text { leg }}=\frac{\text { leg }}{\text { part }}$

$\Rightarrow \frac{14}{q} =\frac{q}{4}

Do cross multiplication.

$\Rightarrow14\times 4 =q\times q

$\Rightarrow 56 =q^2

Switch the sides.

$\Rightarrow q^2 =56

Taking square root on both sides.

\Rightarrow q =2 \sqrt{14}

The value of q is 2 \sqrt{14}.

8 0
3 years ago
What are some solution(s) to the quadratic equation 40 - x^2 = 0
Serhud [2]

Answer:

x = ± 2\sqrt{10}

Step-by-step explanation:

given

40 - x² = 0 ( add x² to both sides )

40 = x² or

x² = 40 ( take the square root of both sides )

x = ± \sqrt{40} = ± \sqrt{4(10)} = ± 2\sqrt{10}

3 0
3 years ago
Can someone help me? it’s due in a few hours
ioda

Answer:

cars value decreases in value exponentially

Step-by-step explanation:

cant really read it but say that the cars value decreases in value exponentially and compare that to however the other cars decrease in value over time

4 0
2 years ago
Solve for x.<br> 11x – 32 = 31 + 8x<br> x = [?]
german

Answer:

x = 21

Step-by-step explanation:

11x – 32 = 31 + 8x

11x = 63 + 8x

3x = 63

x = 21

4 0
3 years ago
Which system of linear equations could be used to determine the price of each book
GuDViN [60]

Answer:

Let the price of the maths book be m and price of the novel book be n

Given that,

Total cost of the books is $54

The price of math book is $8 more than 3 times the price of novel book.

we get,

The system of equation as,

\begin{gathered} m+n=54 \\ m=8+3n \end{gathered}

Hence the system of equation to determine the price of the maths and novel book is,

\begin{gathered} m+n=54 \\ m=8+3n \end{gathered}

4 0
1 year ago
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