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erastova [34]
3 years ago
7

-x-5y=22&y=-7x+16 solve the system by the substitution method

Mathematics
1 answer:
Kaylis [27]3 years ago
4 0
(3,-5) is your answer .-.
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A ceiling light has a cross-section in the shape of a parabola. The parabola is 24 cm wide and 9 cm deep. The lightbulb is locat
Sedbober [7]

Answer:

  4 cm

Step-by-step explanation:

The equation of a parabola with its vertex at the origin can be written as ...

  y = 1/(4p)x^2

The problem statement tells us that one point on the parabola is (x, y) = (12, 9). We can put these values into the equation and solve for p, the distance from the focus to the vertex.

  9 = 1/(4p)(12^2)

  9×4/144 = 1/p = 1/4 . . . . . . . . multiply by the inverse of the coefficient of 1/p

Then p = 4, and the bulb is 4 cm from the vertex.

4 0
3 years ago
What is 2x - 1 < 3? Solve
Licemer1 [7]

Answer:

x<2

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Mrs . Kerr is going to pack 9 carrots, 12 crackers, and 18 grapes into lunch boxes. How many of each food item will be in a lunc
Lilit [14]

Answer:

3 carrots, 4 crackers, and 6 grapes.

Step-by-step explanation:

The greatest common factor of 9, 12, and 18 is 3, so we know that we can make at most 3 identical lunchboxes. Now we have to divide each number by 3 to figure out how much of each item is in each lunchbox. 9/3=3, 12/3=4, and 18/3=6 so there will be 3 carrots, 4 crackers, and 6 grapes in each lunchbox.

4 0
3 years ago
I need help! Please help ASAP
sesenic [268]

Answer:

A

Step-by-step explanation:

It should be all positive

5 0
3 years ago
Read 2 more answers
in the triangles shown, abc is dilated by factor of 2/3 to form xyz. given that angle a is 50 degrees and angle b is 100, what i
Anvisha [2.4K]
We know that

in the triangle ABC
∡A+∡B+∡C=180°
∡C=180-(50+100)-------> ∡C=30°

triangle ABC and triangle XYZ are similar
so
∡X=∡A
∡Y=∡B
∡Z=∡C
hence
∡Z=30°

the answer is
∡Z=30°

7 0
3 years ago
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