All categories

3 years ago

9. If f(x)=-2x^2+4x-6, then f(2)=

Mathematics

1 answer:

Romashka-Z-Leto [24]3 years ago

3 0

Answer:

f(2) = -6

General Formulas and Concepts:

Order of Operations: BPEMDAS

Substitution and Evaluation

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = -2x² + 4x - 6

f(2) is x = 2

<u>Step 2: Solve</u>

Substitute: f(2) = -2(2)² + 4(2) - 6
Exponents: f(2) = -2(4) + 4(2) - 6
Multiply: f(2) = -8 + 8 - 6
Add: f(2) = -6

You might be interested in

What is the length of dk? 7.0 3.5 8.5 12.7

Anarel [89]

To get the value of DK we use proportionality:
AK/EK=BK/KD
thus plugging the values we get:
14/17=7/KD
getting the reciprocal of getting both sides we have:

17/14=KD/7
thus
KD=17/14×7
KD=8.5

4 0

3 years ago

What is another solution of the equation x+7=y

kirza4 [7]

Here are some solutions: (there are actually an infinite amount of them)

x = 0 , y = 7

x = 1 , y = 8

x = 2 , y = 9

x = 3 , y = 10

x = 4 , y = 11

x = 42 , y = 49

x = pi , y = pi + 7

8 0

3 years ago

Sara and Sam are each working on a science project in which they need to research the individual masses of the nine planets (inc

makkiz [27]

Answer:

2000 times

Step-by-step explanation:

Given

Sara:

$Mercury = 3.302 * 10^{23$

$Saturn = 5.685 * 10^{26$

Sam:

$Mercury = 3.302 * 10^{29$

$Saturn = 5.685 * 10^{32$

To determine the number of times, the mass of Saturn is greater than the mass of Mercury, we simply do the following:

$Times = \frac{Saturn}{Mercury}$

Using Sara's measurement; this gives:

$Times = \frac{5.685 * 10^{26}}{3.302 * 10^{23}}$

Apply law of indices

$Times = \frac{5.685 * 10^{26-23}}{3.302}$

$Times = \frac{5.685 * 10^3}{3.302}$

$Times = 5.685/3.302 * 10^3$

$Times = 1.72 * 10^3$

Approximate

$Times = 2 * 10^3$

$Times = 2000$

5 0

3 years ago

Jean closet is having a 15% off storewide sale. You want to buy a pair of jeans originally marked $32.99. What is the sale price

Alika [10]

Answer:

Its around 28 dollars

Step-by-step explanation:

Divide

7 0

3 years ago

It’s says 2xy also i need help so pls help me!!*it easy ig but ifg*

xxTIMURxx [149]

$2 \times x \times y$
im pretty sure

8 0

3 years ago