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Anni [7]
4 years ago
15

Help plc sos any tutor ​

Mathematics
1 answer:
Naddika [18.5K]4 years ago
3 0

Answer:

f(4) = -42

Step-by-step explanation:

f(x) = -10x - 2

f(4) 0r x = 4

Plug In 4 for X then solve

f(4) = -10 x 4 -2

f(4) = -40 -2

f(4) = -42

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Answer:

this is an acute triangle

Step-by-step explanation: hope this helped!

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The length of a rectangle is 1 unit more than the width. The area of the rectangle is 56 units. What is the width in units of th
Mandarinka [93]

Answer:

Width = 7units

Step-by-step explanation:

The area of a rectangle

A = h * w

A - area of a rectangle

h - height of a rectangle

w - width of a rectangle

Or

A = length * breadth

It's all the same

Given :

h = 1 + w

w = w

A = 56

56 = ( 1 + w) * w

56 = ( 1 + w)w

56 = w + w^2

56 = w^2 + w

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Find a factor that can be multiplied to give -56

and added to give + 1

The factor is 8 and -7

Substitute 8w - 7w for w

w^2 + 8w - 7w - 56 = 0

( w^2 + 8w) - (7w - 56) = 0

w( w + 8) - 7( w + 8) = 0

( w - 7) = 0

( w + 8) =0

w - 7 = 0

w = 7

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w = -8

Since a side of any rectangle can not be negative

w = 7

The width of the rectangle is 7units

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Answer:

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Step-by-step explanation:

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