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SVETLANKA909090 [29]
3 years ago
6

What is x in the equation please help.

Mathematics
2 answers:
finlep [7]3 years ago
4 0
X=12
(x+42)+3x=90
4x+ 42 = 90
iogann1982 [59]3 years ago
3 0

Answer:

6

Step-by-step explanation:

vbgdfbgdf bbn bgdfjszvhy

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The function f(t) = 4t2 − 8t + 6 shows the height from the ground f(t), in meters, of a roller coaster car at different times t.
gregori [183]

Answer:

The correct option is 3.

Step-by-step explanation:

The vertex form of a parabola is

f(x)=a(x-h)^2+k            .... (1)

where a, h, and k are integers, and interpret the vertex of f(t). (h,k) is the vertex of the parabola.

The given function is

f(x)=4t^2-8t+6

It can be written as

f(x)=4(t^2-2t)+6

If an expression is defined as x^2+bx, then we need to add (\frac{b}{2})^2 to make it perfect square.

In the expression t^2-2t the value of b is -2. So, we nned to add and subtract (\frac{-2}{2})^2 in the parenthesis.

f(x)=4(t^2-2t+1^2-1^2)+6

f(x)=4(t^2-2t+1)+4(-1)+6

f(x)=4(t-1)^2-4+6

f(x)=4(t-1)^2+2                .... (2)

The vertex form of the parabola is f(x)=4(t-1)^2+2.

From (1) and (2), we get h=1 and k=2. It means the vertex of the parabola is (1,2). Vertex of upward parabola is point of minima. So the  minimum height of the roller coaster is 2 meters from the ground.

Therefore the correct option is 3.

4 0
3 years ago
Few Questions! NEED HELP PLEASE , CONFUSED!!
Firdavs [7]
Multiples of 11 between 1 and 30:

11, 22

So there are 2 numbers that are multiples of 11 in the bin. There are a total of 30 cards, so the probability is written as 2/30. Or we can simplify it to 1/15.

For the next question:

There are a total of 3 + 8 = 11 balls in the bag.

The probability of choosing a red ball is 3/11.

The probability of choosing a green ball is 8/11.

Multiply the three fractions:

3/11 * 3/11 * 8/11 = 72/1331

So the probability is 72/1331.

For the last question:

A standard deck of cards has 52 cards.

There are 4 queens and 4 kings in the deck.

Probability of choosing a queen is 4/52, and the probability of choosing a king AFTER you already chose a queen is 4/51.

Multiply the two fractions:

4/52 * 4/51 = 16/2652

So the probability is 16/2652 or 4/663
7 0
3 years ago
9. Verify experimentally that alternate angles are equal​
hoa [83]

Answer:

i am not sure if i answered your question correctly or not

Step-by-step explanation:

the Alternate Interior Angles Theorem states that, when two parallel lines are cut by a transversal , the resulting alternate interior angles are congruent . So, in the figure below, if k∥l , then ∠2≅∠8 and ∠3≅∠5

hope this help:)

6 0
3 years ago
Helppp ill mark u as brainlist<br>​
ValentinkaMS [17]

Answer:

More work space

Step-by-step explanation:

3 0
3 years ago
Help yalllll question is in the pic
bonufazy [111]
Answer: D) -304

Step-by-Step Solution:

=> f(x) = 5x - 1
=> g(x) = 2x^2 + 1
=> Find value of (f * g)(-3)

First Substitute x as -3 in f(x) and g(x) :-

f(x) = 5x - 1
f(-3) = 5(-3) - 1
f(-3) = -15 - 1
=> f(-3) = -16

g(x) = 2x^2 + 1
g(-3) = 2(-3^2) + 1
g(-3) = 2(9) + 1
g(-3) = 18 + 1
=> g(-3) = 19

Now Multiply f(-3) with g(-3) :-

= f(-3) * g(-3)
= -16 * 19
=> -304

Therefore, (f * g)(-3) = -304
5 0
2 years ago
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