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photoshop1234 [79]
4 years ago
10

Which ordered pair is a solution of 5x + 4y = 18? O (-3,6) O (2,4) O (8,2) O (-2,7)

Mathematics
1 answer:
creativ13 [48]4 years ago
6 0

Answer:

(-2,7)

Step-by-step explanation:

Remember: (x, y), Substitute the numbers:

1. (-3, 6)

5 • -3 + 4 • 6 = 18

-15 + 24 = 18

9 = 18 X, incorrect

2. (2, 4)

5 • 2 + 4 • 4 = 18

10 + 16 = 18

26 = 18 X, incorrect

3. (8, 2)

5 • 8 + 4 • 2 = 18

40 + 8 = 18

48 = 18 X, incorrect

4. (-2, 7)

5 • -2 + 4 • 7 = 18

-10 + 28 = 18

18 = 18, ☆, correct!

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Find the inverse of the function y = 2x^2 + 2.
kupik [55]

Answer:

its the last one.

Step-by-step explanation:

easy way to do inverse functions:

write out equation :

y = 2x^{2} + 2

Switch the x and y:

x = 2y^{2} + 2

Solve for y :

x = 2y^{2} + 2

subtract 2 both sides

x - 2 = 2y^{2}

Divide both sides by 2

\frac{x}{2} - \frac{2}{2} = y^{2}

reduce fraction and square root both sides

7 0
3 years ago
A 10 sided die is numbered 1-10 if you roll it 60 times what is the best prediction for how many times you would eithrr a 1 or 2
Kamila [148]

Answer: 12

Step-by-step explanation:

So if its 1-10, and you can either roll a 1 or 2, it would be 2/10, then simplified to 1/5, and in order to get the answer you need to multiply it by 60

1/5 x 60/1 = 12

(sorry if I got it wrong, feel free to correct me if I did)

8 0
3 years ago
The perpendicular bisector of the line segment connecting the points $(-3,8)$ and $(-5,4)$ has an equation of the form $y = mx +
docker41 [41]

Answer:

m = -1/2 and b = 6.5

Step-by-step explanation:

To find the slope of the original line segment, we have to do the change in y/the change in x:

(4-8)/(-5--3) = -4/-2 = 2

2 is the slope of the original line segment, but since this is the perpendicular bisector, we have to take the negative reciprocal of 2 so m = -1/2

To find b we substitute the values of x, y, and m into the equation. Let's use the x value of -3 and the y value of 8:

y = mx + b

8 = -1/2(-3) + b

8 = 3/2 + b

6.5 = b

5 0
4 years ago
What is the Measure of JL ? 70
Ede4ka [16]
Where is the picture

5 0
3 years ago
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tia_tia [17]

Answer:The answer can be calculated by doing the following steps;

Step-by-step explanation:

I think you have done some mistakes in question because at one stage there comes a complex no. And at the end the value of n comes in decimal.

4 0
3 years ago
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