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vesna_86 [32]
3 years ago
8

Can someone help me? Pleaseeeee

Mathematics
1 answer:
Gennadij [26K]3 years ago
6 0

Answer:

a. x = 82 degrees

b. All angles less than 90 degrees are 65 degrees and 33 degrees and 82 degrees in an acute triangle.

Step-by-step explanation:

A triangle has to equal to 180 degrees, add 65 and 33 together to get 98 degrees, subtract 180 from 98 to get 82 degrees.  Part B is self explanatory.

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If f(x) = 2х2 +1 and g(x) = х2 -7, find (f-g)(x).
Nookie1986 [14]

Option A

If  f(x) = 2x^2 + 1 and g(x) = x^2 - 7 then (f - g)(x) = x^2 + 8

<em><u>Solution:</u></em>

Given that f(x) = 2x^2 + 1 and g(x) = x^2 - 7

To find: (f - g)(x)

We know that,

(f – g)(x) = f (x) - g(x)

Let us substitute the given values of f(x) and g(x) in above formula,

(f - g)(x) = 2x^2 + 1 - (x^2 - 7)

For solving the brackets in above expression,

There are two simple rules to remember:

When you multiply a negative number by a positive number then the product is always negative.

When you multiply two negative numbers or two positive numbers then the product is always positive.

So the expression becomes,

(f - g)(x) = 2x^2 + 1 -x^2 + 7

Combining the like terms,

(f - g)(x) = 2x^2 - x^2 + 1 + 7\\\\(f - g)(x) = x^2 + 8

Thus option A is correct

8 0
2 years ago
(2/3)-(1/X+6)=2 solve for x
nata0808 [166]
We have a fraction with the unknown in the denominator, review how to treat unknowns in the denominator as a refresher for this exercise:
<span>(2/3) - (1/x + 6) = 2
</span>(2/3) - (1 + 6x)/x = <span>2
</span>(2/3) - 2 = (1 + 6x)/x
2/3 - 6/3 = (1 + <span>6x)/x
-4/3 = </span>(1 + <span>6x)/x
-4x = 3</span>(1 + <span>6x)
</span><span>-4x = 3 + 18x
</span>22x = -3
x = -3/22
8 0
3 years ago
$100000 for 3 years at 9% compounded annually
user100 [1]

Answer:

bdhshsibehs hedge hide hdud HD d

Step-by-step explanation:

bdudushdudhdh7e ue7eye he

4 0
2 years ago
What is the mean of the following series : 2, 2, 2, 4, 4, 5, 5, 6, 8, 11, 12, 16 and 18 ?
Debora [2.8K]

add up the number s

2+2+2+4+4+5+5+6+8+11+12+16+18

=95

count the given numbers

the numbers are 13

divide the total numbers(95) by 13

95/13

=7

8 0
2 years ago
Read 2 more answers
45/100 in simplest form
Harrizon [31]
Hello there! How are you today?

First, let's take a look at our numbers.

45 / 100

Both of these numbers have a 0 and a 5, which means it is divisible by 5.
Let's divide both of them by 5.

45 / 5 = 9
100 / 5 = 20

We are now left with 9/20.

This is your simplified fraction since 9 and 20 do not have any common factors.

I hope this helps!
4 0
3 years ago
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