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77julia77 [94]
2 years ago
13

Find x. Question 1 options: 6 3 9 12

Mathematics
1 answer:
Eduardwww [97]2 years ago
3 0

Answer:18

Step-by-step explanation:

You might be interested in
Solve the system of equations algebraically
lora16 [44]
2x + 2y = 10
x + y = 5
x = 5 - y
Substitute for x in the other equation:-

(5 - y - 3)^2 + (y + 2)^2 = 16
(2 - y)^2 + (y + 2)^2 = 16
4 - 4y + y^2 + y^2 + 4y + 4 = 16
2y^2  + 8 = 16

2y^2 - 8 = 0
y^2 =  4

y = +/- 2

consider 2x  + 2y = 10

when y = -2,    2x  =  10 +4  giving    x = 7
when y  = 2,  2x  =  10 - 4  giving x =  3

so solution is  x = 7, y = -2  and x = 3,  y=2.


8 0
3 years ago
“what is the equation of a conic with vertices (-9,3) and (7,3) and foci (-5,3) and (3,3)”
iragen [17]

This is an ellipse.

Equation of an ellipse: \frac{x^2}{a^2}+\frac{y^2}{b^2}=1

Let's find the center point first. We can do this by finding out the midpoint between the vertices or the foci.

(-9+7)/2=-1

Center: (-1,3)

Now we need to find a and b (length along x and length along y).

We know "a". It is the distance between the center and the right or left bound.

a=7-(-1)=8

To find out "b", first see that...

b^2=a^2-(distance from center to foci)^2

foci distance=3-(-1)=4

b^2=8^2-4^2

b^2=64-16

b^2=48

b=4√3

answer: \frac{(x+1)^2}{64}+\frac{(y-3)^2}{48}=1

7 0
3 years ago
The students at Woodward Elementary voted for a school mascot. The falcon won with 5/8 of the votes and the eagle came second wi
Greeley [361]

Answer:

178.67

Step-by-step explanation:

One third written as a fraction is 1/3. You can also write it as a decimal by simply dividing 1 by 3 which is 0.33.

If you multiply 0.33 with 536 you will see that you will end up with the same answer as above.

You may also find it useful to know that if you multiply 0.33 with 100 you get 33.33. Which means that our answer of 178.67 is 33.33 percent of 536.

4 0
3 years ago
Determine the discriminant for the given equation x^2+4x+5=0. Then describe the roots(how many and what type).
Fed [463]

Discriminant = b^2 - 4ac, where a, b and c come from the form of the quadratic equation as ax^2 + bx + c

Discriminant = (4)^2 - 4(1)(5)
= 16 - 20
= -4

-4 < 0, therefor there are no roots

(If the discriminant = 0, then there is one root
If the discriminant > 0, there are two roots, and if it is a perfect square (eg. 4, 9, 16, etc.) then there are two rational roots
If the discriminant < 0, there are no roots)
3 0
3 years ago
Pls help this question i want its aregent
meriva

Step-by-step explanation:

Answer 3

multiply 4 by -20

1/4×-20

= -20/-20

= 1 answer

4 0
2 years ago
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