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leva [86]
3 years ago
8

What are the x-intercepts of the functions fx)=-4(x+3)(x-9) ?​

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
8 0

Answer:

x=9 or -3

Step-by-step explanation:

used quadratic formula

standard form: ax^2 + bx +c

quadratic formula:

x= -b +- square root of b^2 -4(a)(c) divided by 2(a)

Google quadratic equation for more

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Enter your answer and show all the steps that you use to solve this problem.
valina [46]

You will save $9


Convert 20% to decimal

Each % is 0.01 so 20×0.01=0.2

Then multiply

45×0.2=9

6 0
3 years ago
PLEASE HELP <br><br>What is the slope of this line? <br><br>a) -2 <br>b) -1/2<br>c) 1/2<br>d) 2 ​
anyanavicka [17]

Answer:

C: 1/2

Step-by-step explanation:

Use the slope formula

5 0
3 years ago
Read 2 more answers
Prove that if sin (2 + y) = 3 sin (x - y), then tan x = 2 tany.
nignag [31]

Answer:

The proof is given below.

Step-by-step explanation:

Given: ( the correct question and ans is as follow )

sin (x + y) = 3sin ( x - y)

To Prove

tan x = 2 tan y

Proof:

\sin (x+y) = 3\sin (x-y)

Using the identities

\sin (A+B) = \sin A.\cos B + \cos A.\sin B\\and\\\sin (A-B) = \sin A.\cos B - \cos A.\sin B\\

we get

\sin x.\cos y + \cos x.\sin y = 3(\sin x.\cos y - \cos x.\sin y)\\\sin x.\cos y + \cos x.\sin y = 3\sin x.\cos y - 3\cos x.\sin y

Now we will take sin x . cos y to the left hand side and cos x . sin y to the right hand side,we get

3\sin x.\cos y - \sin x.\cos y = 3\cos x.\sin y +\cos x.\sin y\\2\sin x.\cos y =4\cos x.\sin y\\\sin x.\cos y =2\cos x.\sin y \ \textrm{4 divide by 2}\\ \frac{\sin x}{\cos x} =2\times \frac{\sin y}{\cos y} \\\textrm{we know identity }\\\frac{\sin x}{\cos x} = \tan x\\\frac{\sin y}{\cos y} = \tan y\\\therefore \tan x = 2\tan y\ ...............{PROVED}

7 0
3 years ago
Craig went bowling with 25$ to spend. He rented shoes for $5.25 and paid $4.00 for each game. What was the greatest number of ga
lidiya [134]
25-5.25 gives you the amount of money Craig can spend for games. 25-5.25=19.75. If Craig can spend 19.75, he can play only 4 whole games.
5 0
3 years ago
Read 2 more answers
Vitamins in Milk - Milk is a good source of many vitamins that can help us stay healthy. FDA recommends that the average vitamin
iragen [17]

Answer:

O Confirm, because the p-value is much smaller.

Step-by-step explanation:

The p-value is the probability used to determine whether to accept or reject an null hypothesis. Higher p-value means that there is evidence in favour of the null hypothesis while smaller p-value means that there is stronger evidence in favour of the alternative hypothesis. For the case above, the p-value is smaller which means that the new study confirms the results of the first study which also have a small p-value.

7 0
3 years ago
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