3 years ago

The expression 2x to the second power + 1 when x equals negative 2

Mathematics

1 answer:

pantera1 [17]3 years ago

4 0

17

2x^2+1

x=-2

2(-2)^2+1 <First substitute -2 as x
-4^2+1 <Multipy
16+1 <Square 4^2
17

You might be interested in

Compare the decimals 16.30 and 16.3

pshichka [43]

16.30 and 16.3 equal. If you ever have a problem like that then you just add on a zero.

Example:
19.4500 = 19.45 Just add two zeros on the end
19.45 + two zeros = 1.4500

8 0

3 years ago

Pls help!!!

Effectus [21]

A is the correct choice

3 0

3 years ago

The function f(t)=t^2+12t-18 represents a parabola.

Lyrx [107]

$y= t^{2} +12t -18 \\ y+18=t^{2} +12t \\ y+18+36=t^{2} +12t+36 \\ y+54=(t+6)^{2} \\ y=(t+6)^{2} -54$
$f(t) = (t+6)^{2} -54$

6 0

3 years ago

The triangles below are similar. What is the length of ? A. 17 cm C. 19 cm B. 18 cm D. 20 cm

denis-greek [22]

Answer:

B. 18 cm.

Step-by-step explanation:

Because they are similar, we can say that segment AC corresponds to segment DF, and segment AB corresponds to segment ED. So, we can set up a proportion.

$\frac{16}{24} =\frac{12}{x}$

$\frac{2}{3} =\frac{12}{x}$

2 * x = 12 * 3

2x = 36

x = 18

So, the length of ED is B. 18 cm.

Hope this helps!

4 0

4 years ago

Solve the inequality 25x + 12y + 4 <= 130

hodyreva [135]

31x is the answer ok

6 0

3 years ago