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blagie [28]
2 years ago
13

8x+5y=24 y=−4x ​what is X and Y??

Mathematics
2 answers:
Mrac [35]2 years ago
8 0

Answer:

Step-by-step explanation:

plug y into the first equation:

8x+5y=24

8x+5(-4x)=24

8x-20x=24

-12x=24

x=-24/12

x=-2

then plug x to the second equation

y=-4

y=-4(-2)

y=8

x=-2

y=8

zalisa [80]2 years ago
5 0

8x + 5y = 24

You just told us that  Y = -4x .

If that's true, then

8x + 5(-4x) = 24

8x - 20x = 24

-12x = 24

<em>x = -2</em>

<em></em>

y = -4x

y = -4(-2)

<em>y = 8</em>

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consider the function f(x)=5(x+2)^(2)-3 which of the following function shifts the gragh of (x) upward by 4 units
ivolga24 [154]

Answer:

g(x)=5(x+2)^2+1

Step-by-step explanation:

The given function is f(x)=5(x+2)^2-3.

Let the new function be g(x).

Then g(x) is obtained by shifting f(x) up by 4 units.

This implies that: g(x)=f(x)+4

g(x)=5(x+2)^2-3+4

g(x)=5(x+2)^2+1

Hence the new function is  g(x)=5(x+2)^2+1

8 0
3 years ago
Find an angle where sine and cosine are equal. find the tangent of that angle
algol13

Answer: The angle is 45\° and the tangent is 1

Step-by-step explanation:

The angle \theta at wich the functions sine and cosine are equal is 45\°. Let's prove it:

sin (45\°)=0.7071

cos (45\°)=0.7071

Hence:

sin (45\°)=cos (45\°)

On the other hand, the tangent function is defined as:

tan \theta=\frac{sin \theta}{cos \theta}

Then:

tan (45\°)=\frac{sin (45\°)}{cos (45\°)}

tan (45\°)=\frac{0.7071}{0.7071}

tan (45\°)=1

6 0
3 years ago
My geometry teacher doesn't really teach so I need help!
stepladder [879]

Answer:

g(3) = 6

Step-by-step explanation:

The right side of the equation is the part with all the information for the doing of the math.

x^2 - 3 means square the number and then subtract 3.

On the left side of the equation is the g(x). g(x) or f(x) or k(x) is literally just y. Someone could ask what is f(x)? It is y.

What is g(x)? It is y.

What is g? It is the name of the function. So instead of saying ..."the thing where you square a number and then subtract 3..." you can just say "g". Now the (x) beside g DOESNOT mean times, bc sometimes parenthesis means times. THIS IS NOT TIMES!

The (x) is like a billboard. Tells you who will be starring as x in the work on the right side of the equation.

If you see g(x)=x^2-3

then whatever is in the ( ) on the left, put that in the place of x on the right.

g() = ^2 - 3

g(12) = 12^2 - 3

g(-7) = (-7)^2 - 3

or like your question

g(3) = 3^2 - 3

do the calculation

g(3) = 9 - 3

g(3) = 6

done! Hope this helps!

3 0
2 years ago
While shopping for clothes, Curtis spent $33 less than 3 times what Jaclyn spent.Curtis spent $12.Write and solve an equation to
Tema [17]

Answer:

12 x 3 = 36 + 33

Step-by-step explanation:

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7 0
3 years ago
A theater group made appearances in two cities. The hotel charge before tax in the second city was $500 lower than in the first.
Mazyrski [523]

Answer:

First city: $5,500

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Step-by-step explanation:

Let's define x as the hotel price in the first city and y the hotel price in the second city.  We can start with this equation:

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We place the value of y from the first equation in the second equation:

0.065x + 0.045 (x - 500) = 582.50

0.065x + 0.045x - 22.50 = 582.50 (simplifying and adding 22.5 on each side)...

0.11x = 605

x = 5,500

The cost of the first hotel was $5,500

Thus, the cost of the second hotel was $5,000 (x - 500)

6 0
3 years ago
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