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3 years ago

What is (-49/7) + (-64/8)=

Mathematics

1 answer:

Ilia_Sergeevich [38]3 years ago

4 0

Answer:

-15

Step-by-step explanation:

Simplify

-49/7= -7

-64/8 = -8

Dividing a negative by a positive gives a negative.

(-7) + (-8) = -15

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Lorico [155]

Answer:

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Step-by-step explanation:

1100×(0.05×6)+1100=1430

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3 years ago

What is the gradient of the graph shown? Give your answer in its simplest form.

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3 years ago

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masha68 [24]

Answer: x = 20

Explanation:
X + 3x + 10 = 90
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Step by step:
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3 years ago

Use the figure on the Pythagorean theorem to write an equation relating H, D and x

atroni [7]

Answer:

h² + x² = d²

Step-by-step explanation:

h and x are legs. d is the hypotenuse.

h² + x² = d²

4 0

3 years ago

Given f(x) = x^2 − 2x − 5.

lukranit [14]

Answer:

$(x - 1)^2 - 6$

Step-by-step explanation:

You need to know:

Vertex form = $a(x -h)^2 + k$

The vertex is at

(h, k)

Need to know about perfect squares

Need to know how to complete the square.

-----------------------------------------------------------------------------------------

To convert $x^2-2x-5$ you need to complete the square on the equation.

Complete the Square $x^2 - 2x -5$

$x^2 - 2x -5$

$(x^2 - 2x) -5$

Divide -2 by 2 and then square it.

$\frac{-2}{2} = -1$

$-1^2 = 1$

Add the one to the parentheses and subtract the one from the 5

$(x^2 - 2x +1) -5 -1$

Square $(x^2 - 2x +1)$

$(x-1)^2$

Now we have

$(x - 1)^2 -5 -1$

Next add -5 - 1 = -6

$(x - 1)^2 - 6$

Our quadratic is in vertex form now.

Vertex form = $a(x -h)^2 + k$

our equation = $(x - 1)^2 - 6$

Vertex = (1, -6)

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4 years ago