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3 years ago

Evaluate the function. f(x) = 2x2 Find f(-3)

Mathematics

2 answers:

Viktor [21]3 years ago

8 0

Answer:

Step-by-step explanation:

You have to understand two things about this question.

f(x) is a relative of y. So maybe it would help you if you wrote y = 2x^2
The second thing you have to understand is when you see a number used instead of the x, that number goes into every x on the right.

f(-3) = 2(-3)^2

f(-3) = 2 * 9

f(-3) = 18

Remember that (-3) ^2 = -3 * - 3 = 9 a positive.

Ede4ka [16]3 years ago

4 0

F(-3)=-12
because f(x) is y=2*2=4

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What value of x is line a parallel to line b?

Aliun [14]

Answer:

x=15

Step-by-step explanation:

the angle 7x+12 and 63 are on opposite sides of complimentary, meaning they add to 180.

180-63 = 117

117-12 = 105

105/7 = 15

8 0

3 years ago

The probability that it rains in London on any particular day is 0.3.

SpyIntel [72]

Answer:

It is 14.45 percent .

Step-by-step explanation:

Explanation:

The first day is independent from the day before. Therefore the first day probability (of rain) is 20 percent.

The second day (depends on the previous day) rainfall probability is 85 percent.

Finally, the third day (it must be rainy to satisfy the total probability) rainfall probability is 85 percent.

The probability of having three consecutive days which are rainy:

P(all rainy)

0.20

0.85

0.1445

or 14.45 percent.

6 0

3 years ago

Read 2 more answers

Determine whether the points lie on straight line.

wel

Answer:

A) Non-collinear- does not lies on straight line

B) Collinear- lie on straight line

Step-by-step explanation:

We have to check collinearity of three points.

The points $(x_1, y_1, z_1),(x_2, y_2, z_2),(x_3, y_3, z_3)$ are said to be collinear if,

$\left[\begin{array}{ccc}x_1&y_1&z_1\\x_2&y_2&z_2\\x_3&y_3&z_3\end{array}\right] = 0$

A) A(2, 5, 3), B(3, 7, 1), C(1, 4, 4)

$\left[\begin{array}{ccc}2&5&3\\3&7&1\\1&4&4\end{array}\right] \\\\=2(28-4)-5(12-1)+3(12-7)\\= 8 \neq 0$

Thus, the given points are not collinear.

B) D(0,-5,5), E(1,-2,4), F(3,4,2)

$\left[\begin{array}{ccc}0&-5&5\\1&-2&4\\3&4&2\end{array}\right] \\\\=0(-4-16)+5(2-12)+5(4+6)\\=0$

Thus, the given points are collinear.

6 0

3 years ago

A flower show has an inventory of 60 tulips and 100 roses. If T represents tulips and R represents roses, which of the following

PilotLPTM [1.2K]

Answer: 3/5xr=t and 5/3xt=r

Step-by-step explanation:

3 0

3 years ago

Solve for x 26=3x+2x-9

umka2103 [35]

Combine like terms on the right side:

$3x + 2x = 5x$
$26 = 5x - 9$

Add 9 to both sides:

$35 = 5x$

Divide both sides by 5 to get x by itself:

$x = 7$

The value of x is 7.

8 0

4 years ago