3 years ago

Please help me this is for a grade and i rly need this ! :(

Mathematics

1 answer:

Iteru [2.4K]3 years ago

8 0

Answer:

y=1/2x-3

Step-by-step explanation:

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In right triangle PQR , PQ=12 cm and QR=5cm .What is cos R?

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Answer:

cosR = $\frac{5}{13}$

Step-by-step explanation:

assuming the right triangle has ∠ Q = 90° with legs 5 and 12

then this is a 5- 12- 13 right triangle with hypotenuse PR = 13 cm

then

cosR = $\frac{adjacent}{hypotenuse}$ = $\frac{QR}{PR}$ = $\frac{5}{13}$

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Triangle MNO is reflected over the x-axis and then translated up 4 and right 3.

stepan [7]

Answer:

Translate the pre-image down 4 and right 3 and then reflect the figure over the x-axis.

Step-by-step explanation:

The pre-image consists of points:

(1, 3), (2, 1), (-1, 2)

Translating them down 4 units, we get:

(1, 3-4), (2, 1-4), (-1, 2-4)

(1, -1), (2, -3), (-1, -2)

Translating them right 3, we get:

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Reflecting them over the x-axis., we get:

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What is an equation of the axis of symmetry for the parabola whose equation is y=2x^2 + 8x-1

docker41 [41]

Answer:

x = - 2

Step-by-step explanation:

The equation of the axis of symmetry is a vertical line with equation

x = c

where c is the value of the x- coordinate of the vertex

The x- coordinate of the vertex is

x = - $\frac{b}{2a}$

Given

y = 2x² + 8x - 1

with a = 2 and b = 8 , then

x = - $\frac{8}{4}$ = - 2

x = - 2 is the equation of the axis of symmetry

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2 years ago