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Bogdan [553]
2 years ago
14

I WILL MARK AS BRAINLIEST! Simplify

Mathematics
2 answers:
Stolb23 [73]2 years ago
6 0
A.) -98
b.) -12
c.) -105
d.) -46
I promise I did not copy.
nevsk [136]2 years ago
5 0

Answer:

a) -98

b) -12

c) -105

d) -46

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Which relation is a function?
Leno4ka [110]

Answer:

The bottom left one

Step-by-step explanation:

They are the only graph that has one output for each x value

3 0
2 years ago
Which expression is equivalent to (sin x + 1)(sin x − 1)? A. cos2x B. -cos2x C. cos2x + 1 D. cos2x − 1 E. -cos2x + 1
Semenov [28]

ANSWER

B.

- \cos^{2} x

EXPLANATION

The given expression is

(sin x + 1)(sin x − 1)

Note that:

(x + 1)(x - 1) =  {x}^{2}  - 1

This implies that,

( \sin \: x + 1)( \sin \: x - 1)  =   \sin^{2} x - 1

We can factor -1 on the right hand side to get,

( \sin \: x + 1)( \sin \: x - 1)  =    - (1 - \sin^{2} x )

Note that from the Pythagorean Identity

1 - \sin^{2} x = \cos^{2} x

We apply this identity to obtain:

( \sin \: x + 1)( \sin \: x - 1)  = - \cos^{2} x

The correct choice is B

4 0
3 years ago
Kenyon ran for 8 miles each week while training. Here is his record of the number of miles he ran.
diamong [38]

Step-by-step explanation:

Let x be the miles Kenyon ran on tuesday

Let y be the miles Kenyon ran on thursday

Given,

Mon + Tues + Wed + Thu = 8mi

1.2 + x + 1.6 + y = 8 \\ 2.8 + x + y = 8 \\ x + y = 8 - 2.8 \\ x + y = 5.2

also given,

y = x + 0.4 \\  - x + y = 0.4

Now we have x + y = 5.2 as equation 1 and -x + y = 0.4 as equation 2

Using equation 1,

x + y = 5.2 \\ x = 5.2 - y

Substitute this equation into equation 2.

- (5.2 - y) + y = 0.4 \\  - 5.2 + y + y = 0.4 \\  - 5.2 + 2y = 0.4 \\ 2y = 0.4 + 5.2 \\ 2y = 5.6 \\ y = 5.6 \div 2 \\  = 2.8mi

Substitute y = 2.8 into equation 1.

x + 2.8 = 5.2 \\ x = 5.2 - 2.8 \\  = 2.4mi

Therefore Kenyon ran 2.4 miles on tuesday, and ran 2.8 miles on thursday.

8 0
2 years ago
A 19-yard gain<br> What does it look like
Verizon [17]

Answer:

A 19 yard gain

Step-by-step explanation:

Simple the question answers itself

8 0
2 years ago
Simplify by using like terms 15f-5+2f
wel
15f - 5 + 2f

Rearrange terms

15f + 2f -5

Factor f out

f(15+2) -5

Simplify

17f -5
5 0
3 years ago
Read 2 more answers
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