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rosijanka [135]
2 years ago
7

Using the rule y = 4x , find thr value of y when x is 5

Mathematics
1 answer:
Sidana [21]2 years ago
6 0

Answer:

y=4(5) =20

Step-by-step explanation:

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2 sin^2 (x) -5 sin (x) -3=0
andreyandreev [35.5K]

we have that

2sin^{2} x-5sin x-3=0

I. Rewrite the equation by substituting the expression u in for sin x.

2u^{2} -5u-3=0

II. Factor the quadratic expression. Rewrite the equation with factors instead of the original polynomial.

2u^{2} -5u-3=0 is equal to

using a graph calculator-----> see the attached figure

(u-3)*(2u+1)=0

III. Use the zero product property to solve the quadratic equation.

(u-3)*(2u+1)=0

(u-3)=0--------------> u=3

(2u+1)=0-------- 2u=-1------> u=-1/2-----> u=-0.5

IV. Rewrite your solutions to Part III by replacing u with sin x.

sin x=3--------> is not the solution (sin x can not be greater than 1)

sin x=-0.50------>is the solution

V. Solve the remaining equations for x, giving all solutions to the equation.

sin x=-0.50

if the sine is negative

then

x belong to the III or IV quadrant

we know that

sin 30°=0.50

so

the solution for the III quadrant is

x=180°+30°-------> x=210°

the solution for the IV quadrant is

x=360°-30°------> x=330°

5 0
3 years ago
Margaret is solving the linear equation 3(x+4)=42 . As she was solving, she took the equation 3(x+4)=42 , performed an algebraic
Varvara68 [4.7K]

Answer:

D) Distributive Property

Step-by-step explanation:

3×x=3x

3×4=12

3x+12=42

3 0
2 years ago
Read 2 more answers
What is negative 1/3 divided by negative 4/5
valina [46]
0.01666666666


-1/3 divided by -4/5


hope this helps you
7 0
3 years ago
A clothing store is having a sale in which everything is 10% off. A shirt's original price is $27. A customer uses a coupon for
Brums [2.3K]

Answer:

C. $7.70

Step-by-step explanation:

First, you have to calculate the 10% of the price and subtract that from the price to find the amount of the discount:

$27*10%=$2.7

Now, you can add the amount of the discount plus the coupon to find the amount that the customer saved:

$5+$2.7=$7.7

According to this, the answer is that the customer saved: C. $7.70

5 0
3 years ago
Show that the equation y + 8 = 2(4x + 4) is linear and that it represents a proportional relationship between x and y.
IceJOKER [234]

Answer:

Step-by-step explanation:

6 0
2 years ago
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