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mote1985 [20]
3 years ago
10

Please help me with this math question I really need help ;/. I'll give brainliest if u help.

Mathematics
1 answer:
Darya [45]3 years ago
7 0

Step-by-step explanation: You have to substitute the numbers in for x & y

(0, -5): YES

3x - 4y - 8 = 12

3(0) - 4(-5) - 8 = 12

0 + 20 - 8 = 12

20 - 8 = 12

12 = 12


(4, -2): YES

3x - 4y - 8 = 12

3(4) - 4(-2) - 8 = 12

12 + 8 - 8 = 12

20 - 8 = 12

12 = 12


(8, 2): NO

3x - 4y - 8 = 12

3(8) - 4(2) = 12

24 - 8 = 12

16 = 12


(-16, -17): YES

3x - 4y - 8 = 12

3(-16) - 4(-17) - 8 = 12

-48 + 68 - 8 = 12

20 - 8 = 12

12 = 12


(-1, -8): NO

3x - 4y - 8 = 12

3(-1) - 4(-8) = 12

-3 + 32 = 12

29 = 12


(-40, -34): NO

3x - 4y - 8 = 12

3(-40) - 4(-34) - 8 = 12

-120 + 136 - 8 = 12

16 - 8 = 12

8 = 12


Hope this help you!!! :)

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Idk how to do this math problem...can u plz help?​
liberstina [14]

Answer:

F) A=(12*12)+((6*12)/2)

Step-by-step explanation:

We can find the answer by breaking up the area into to parts: the square and the triangle

To find the area of the square we use the formula length * width or side^2

This gives us 12*12 which is shown in the first part of each equation

To find the area of the triangle, we must use the formula A= (base * hight)/2

We know the hight is 12 because the hight is the same as the hight or side length of the square, but we still need to find the length of the base of the triangle

Since we know the total length of the bottom of the combined square and triangle is 18 and we know the side length of the bottom of the square is 12 (given to us at the top side of the square and we know the side of a square are of equal length)

Using this information to find the length of only the triangle base we can say

Length of triangle base = Length of total/combined base - length of square base  

Plugging in these numbers we get:

Length of triangle base = 18-12 which equals 6

So length of triangle base is 6

Going back to our equation for area of a triangle A=(base*hight)/2

We can plug in our numbers using 6 for the base and 12 for the height

A=(6*12)/2

Now we combine this with our equation for the area of the square (A= 12 * 12) to get our final answer

A= (12*12) + ((6*12)/2)

Hope this helps :)

6 0
3 years ago
Please help I need answers quick! please zoom in!
kolezko [41]

Answer:

yes x=4 is a solution

Step-by-step explanation:

45x = 180

divide each side by 45

45x/45 = 180/45

x = 4

x=4 is a solution

3 0
3 years ago
Read 2 more answers
Y-3x=-2
GuDViN [60]

Answer: (2,4)

Step-by-step explanation:

3 0
3 years ago
Solve the equation for principal values of x. Express solutions in degrees.
Hitman42 [59]

Option C:

x = 90°

Solution:

Given equation:

\sin x=1+\cos ^{2} x

<u>To find the degree:</u>

\sin x=1+\cos ^{2} x

Subtract 1 + cos²x from both sides.

\sin x-1-\cos ^{2} x=0

Using the trigonometric identity:\cos ^{2}(x)=1-\sin ^{2}(x)

\sin x-1-\left(1-\sin ^{2}x\right)=0

\sin x-1-1+\sin ^{2}x=0

\sin x-2+\sin ^{2}x=0

\sin ^{2}x+\sin x-2=0

Let sin x = u

u^2+u-2=0

Factor the quadratic equation.

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

u + 2 = 0,  u – 1 = 0

u = –2, u = 1

That is sin x = –2, sin x = 1

sin x can't be smaller than –1 for real solutions. So ignore sin x = –2.

sin x = 1

The value of sin is 1 for 90°.

x = 90°.

Option C is the correct answer.

3 0
3 years ago
Read 2 more answers
Hello! Please ignore the stuff I already wrote, can someone help me find x and y?
DanielleElmas [232]

Answer:

x=12

y=12\sqrt{3}

Step-by-step explanation:

Hey There!

to solve this problem we need to use the 30 - 60 - 90 triangle rule

So you are correct on x because the hypotenuse is 2x

24/2=12

y would equal 12\sqrt{3}

as you could see in the image down below

4 0
3 years ago
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