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Soloha48 [4]
3 years ago
15

What the x coordinate?

Mathematics
2 answers:
shutvik [7]3 years ago
8 0

Answer:

x=-2

Step-by-step explanation:

If the question is asking for the intersection point, the answer is x=-2 or (-2,1) depending on if the teacher is asking for the intersection or value of x where it itersects

If the question is asking what the equation of the parabola is I would guess it is (x+1/2)^2 -4

I say go with x=-2 though

kobusy [5.1K]3 years ago
6 0
The answer is x= -2 !!!
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An investment in a savings account grows to three times the initial value after t years. If the rate of interest is 5%, compound
RideAnS [48]
3p=pe^0.05t
3=e^0.05t
T=(log(3)÷log(e))/0.05
T==21.97 years
4 0
3 years ago
Solve the following equations.<br> log2(x^2 − 16) − log^2(x − 4) = 1
Alenkasestr [34]

Answer:

x=\frac{4*(2+e)}{e-2}

Step-by-step explanation:

Let's rewrite the left side keeping in mind the next propierties:

log(\frac{1}{x} )=-log(x)

log(x*y)=log(x)+log(y)

Therefore:

log(2*(x^{2} -16))+log(\frac{1}{(x-4)^{2} })=1\\ log(\frac{2*(x^{2} -16)}{(x-4)^{2}})=1

Now, cancel logarithms by taking exp of both sides:

e^{log(\frac{2*(x^{2} -16)}{(x-4)^{2}})} =e^{1} \\\frac{2*(x^{2} -16)}{(x-4)^{2}}=e

Multiply both sides by (x-4)^{2} and using distributive propierty:

2x^{2} -32=16e-8ex+ex^{2}

Substract 16e-8ex+ex^{2} from both sides and factoring:

-(x-4)*(-8-4e-2x+ex)=0

Multiply both sides by -1:

(x-4)*(-8-4e-2x+ex)=0

Split into two equations:

x-4=0\hspace{3}or\hspace{3}-8-4e-2x+ex=0

Solving for x-4=0

Add 4 to both sides:

x=4

Solving for -8-4e-2x+ex=0

Collect in terms of x and add 4e+8 to both sides:

x(e-2)=4e+8

Divide both sides by e-2:

x=\frac{4*(2+e)}{e-2}

The solutions are:

x=4\hspace{3}or\hspace{3}x=\frac{4*(2+e)}{e-2}

If we evaluate x=4 in the original equation:

log(0)-log(0)=1

This is an absurd because log (x) is undefined for x\leq 0

If we evaluate x=\frac{4*(2+e)}{e-2} in the original equation:

log(2*((\frac{4e+8}{e-2})^2-16))-log((\frac{4e+8}{e-2}-4)^2)=1

Which is correct, therefore the solution is:

x=\frac{4*(2+e)}{e-2}

6 0
4 years ago
Rob collects data about how many customers enter and leave a store every hour. He records a positive number for customers enteri
makkiz [27]
To answer the question, we utilize the given data and solve for the number of customers left in the store after every 1 hour interval.

Initially, there were 75 customers.

1:00 to 2:00 :        75 + 30 - 12 = 93
2:00 to 3:00   :      93 + 14 - 8   = 99
3:00 to 4:00   :      99 + 18 - 30 = 87
4:00 to 5:00   :  If the store does not accept any more customers except those who are already inside then, all 87 must leave between 4:00 to 5:00 in order to empty out the store by 5:00

ANSWER: (a) 4:00 to 5:00
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7 0
3 years ago
How do you solve this problem
NNADVOKAT [17]
Answer is 9 root3
this is because it is one of the special triangle: with special ration of 2x:root3x:1x
you could plug values into the sin formula as well.

9 cm is the smallest length since it is across from the 30° angle. so there fore 9 is 1x
x is 9.

root3x = 9root3
4 0
3 years ago
Read 2 more answers
How do I know that a fraction is equivalent??
Vladimir [108]
You know that a fraction is equivalent is the number multiply or divide into each other. So 4/12 is equivalent to 13 because 4 is a third or 12.
8 0
3 years ago
Read 2 more answers
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