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kolbaska11 [484]
3 years ago
9

If f(x)= 2x^2 +5, find f(-2)

Mathematics
2 answers:
kaheart [24]3 years ago
5 0
Use the magic napkin

kherson [118]3 years ago
3 0
The answer would be 13. You just replace the "x" with "-2" so the equation will look like f(-2) = 2(-2)^2+5. Which all comes out to 13.
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Ali studies for 3 hours 45 minutes. He started studying at 4:30 pm. At what time did he finish?
lana66690 [7]
I believe he would have finished at 8:15 pm
8 0
3 years ago
A change in the dollar price of yen from $1 = 100 yen to $1 = 50 yen will:
drek231 [11]
Easy 37...9/01. BeCaus u have to do tell x and -Apple-3 =37...9/01
6 0
3 years ago
At the movie theatre, child admission is $5.20 and adult admission is $9.00 . On Saturday, 156 tickets were sold for a total sal
stiks02 [169]

We can solve this by using systems of equations.

Let's find our first formula, how much money was made using the tickets.

5.20x + 9y = 1027.80

Here x is how many child tickets we sold and y is how many adult tickets we sold. Now that we have defined that, we can make another formula for the total tickets sold!

x + y = 156 since we sold 156 tickets that could be any combination of child and adult tickets.

Let's solve this system. I'm going to use <em>substitution</em> so I'm going to take our second formula and subtract both sides by x to get y = 156 - x.

Now I will plug this in the first equation for y to get You plug it in for y to get 5.20x + 9 (156-x) = 1027.8.

From this you can solve for x to get x = 99.

Since x + y = 156

99 + y = 156

y = 57

There were 99 child tickets and 57 adult tickets.

3 0
3 years ago
If you choose each randomly, what is the probability that you choose a peach pie and coffee? Write as a simplified fraction.
emmasim [6.3K]

Answer:

1\4

Step-by-step explanation:

i did it out of 100 i choose 25/100

then id you simplified that 25 goes into 100 4 times 25 goes into int self one time so the answer is 1/4

4 0
2 years ago
11/ 42 Marks
amm1812

Answer:

(a)x=128 degrees

(b)\angle APD\neq 116^\circ

Step-by-step explanation:

\angle ABD+\angle CBD =180^\circ$ (Linear Postulate)\\\angle ABD+116^\circ =180^\circ\\\angle ABD=180^\circ-116^\circ\\\angle ABD=64^\circ

(a) Now:

\angle AOD=2 \times \angle ABD$ (Angle at the centre is twice the  angle at the circumference)\\x=2 \times 64^\circ\\x=128^\circ

(b)

\angle APD=2 \times \angle ABD$ (Inscribed Angle Theorem)\\\angle APD=2 \times 64^\circ\\ \angle APD=128^\circ

\angle APD\neq 116^\circ

7 0
2 years ago
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