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Reil [10]
2 years ago
14

Please help and explain so I understand!!​

Mathematics
1 answer:
olga_2 [115]2 years ago
8 0

Answer:

x=5

Step-by-step explanation:

4x^2-11=89

add 11 to both sides

4x^2=100

Divide 4 on both sides

x^2=25

Take the square root of both sides to eliminate the power of two from x

\sqrt{x^2} =\sqrt{25}

Simplify

x=5

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Calculate the area of the shaded region
velikii [3]

Answer:

48π or 150.72

Step-by-step explanation:

The radius of the big circle is 8.

We can use that to find the area of the big circle.

Area is πr^2

π(8)^2

64π

Now, we can find the area of the small circle.

The diameter of that is 8, meaning the radius is 4.

πr^2

π(4)^2

16π

Now we subtract the area of the small circle from the area of the big circle to get the area of the shaded region.

64π-16π=48π

As a decimal: 48*3.14=150.72

4 0
3 years ago
If f(x) = 4^x - 8 and g(x) = 5x + 6, find (f - g)(x)
olganol [36]

Answer:

4^x-5x-14

Step-by-step explanation:

f-g=(4^x-8)-(5x+6)=4^x-8-5x-6=4^x-5x-14

6 0
3 years ago
Read 2 more answers
Please help quickly as possible please
zheka24 [161]
First we need to establish the fact that angles on a straight line ALWYS add up to 180
So, we solve the equation for x which turns out to be 3
But,were not done. The question asks us to find the value of the angle BOC
so we substitute the value of x into the equation for BOC (which is 6x+29)
And then your answer is 47 degrees

7 0
3 years ago
On average, a person spends $240 every 3 months on their cellphone bill . What would the price for 1 month. How much would this
Elena L [17]

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Answer:

$960

Step-by-step explanation:

price of one month = total expense/ number  of month

= 240/3= $80

therefore persons annual expenses = 80*12= $960

3 0
2 years ago
write the equation of the line that passes through the points (0,-5) and (2,-1) in fully reduced point slope form
statuscvo [17]

Answer:

Point Slope Form: y - 0 = 2 (x + 5)

5 0
3 years ago
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