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tatyana61 [14]
3 years ago
9

Solve 6-x=4(5+x)-4 what would the answer be

Mathematics
1 answer:
masya89 [10]3 years ago
6 0

Answer:

x = -2

Step-by-step explanation:

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Find all solutions to the equation:
crimeas [40]

Let z = sin(x). This means z^2 = (sin(x))^2 = sin^2(x). This allows us to go from the equation you're given to this equation: 7z^2 - 14z + 2 = -5

That turns into 7z^2 - 14z + 7 = 0 after adding 5 to both sides. Use the quadratic formula to solve for z. The only solution is z = 1 (see attached image). Since we made z = sin(x), this means sin(x) = 1. All solutions to this equation will be in the form x = (pi/2) + 2pi*n, which is the radian form of the solution set. If you need the degree form, then it would be x = 90 + 360*n

The 2pi*n (or 360*n) part ensures we get every angle coterminal to pi/2 radians (90 degrees), which captures the entire solution set.

Note: The variable n can be any integer.

7 0
3 years ago
4.
OLEGan [10]

Answer:

\cos\ A = \frac{2}{4.5}

Step-by-step explanation:

Given

sin\ A = \frac{2}{4.5}

See attachment

Required

Explain and correct the error

The error in the equation is that: the formula of cosine of angle A is used to calculate the sine of angle A.

The ratio can be corrected as by using:

\cos\ A = \frac{Adjacent}{Hypotenuse}

\cos\ A = \frac{AC}{AB}

\cos\ A = \frac{2}{4.5}

8 0
3 years ago
2% of 0.00003 equals?
kakasveta [241]

Answer:

6e-7? i used a percentage calculator and this is what it gave me  so im not entirely sure

Step-by-step explanation:

3 0
3 years ago
A gym floor has a perimeter of 615 feet What is the<br> perimeter of the floor in yards?
bogdanovich [222]

Answer:

205 yards

Step-by-step explanation:

One yard is 3 feet

Divide 615 feet by 3 to get 205

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3 years ago
at 4:00 am the temperature was -9 degrees f. at noon the temperature was 18 degrees f. what was the change in temperature
Nutka1998 [239]
There was a change of 27 degrees F.
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