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Liono4ka [1.6K]
3 years ago
6

Find f(–2) for the function f(x) = 3x2 – 2x + 7.

Mathematics
1 answer:
sattari [20]3 years ago
8 0

Answer:

23

Step-by-step explanation:

3(-2)2-2(-2)+7

3(4)-(-4)+7

12+4+7

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Plzz help in 3rd part of question 3​
ASHA 777 [7]

Answer:

X=28/9, Y=7/5

Step-by-step explanation:

By using Elimination method

Multiply equation 1 by 9 and equation 2 by 3/2

<h2>There you get those values listed above for <u>x</u><u> </u><u>a</u><u>n</u><u>d</u><u> </u><u>y</u></h2>
7 0
3 years ago
ZA and B are supplementary angles.
yKpoI14uk [10]

Answer:

135°

Step-by-step explanation:

a supplementary angle is equal to 180°. since you already have the measure of ZA, all you need to do is subtract 45°, the measure of ZA, from 180°, the total measure of a supplementary angle, in order to figure out the measure of ZB.

180 - 45 = 135, therefore the measure of ZB = 135°.

5 0
3 years ago
The heights of women aged 20 – 29 in the United States are approximately Normal with mean 64.2 inches and standard deviation 2.8
Bumek [7]

Answer: 0.64

Step-by-step explanation:

Given : The heights of women aged 20 – 29 in the United States are approximately Normal with \mu=64.2 inches and \sigma=2.8 inches.

Let x denotes the height of women.

Since 1 feet = 12 inches

5.5 feet = 5.5\times12=66 inches

Then, the z-score corresponds to x=66 inches will be :-

z=\dfrac{66-64.2}{2.8}=0.642857142857\approx0.64

Hence, the z ‑score for a woman 5.5 feet tall = 0.64

8 0
4 years ago
Explain why 2n+1 must be an odd number
Lorico [155]
If is an integer (a whole number), then the expression represents an even number, because even numbers are the multiples of 2. The expressions 2 n − 1 and 2 n + 1 can represent odd numbers, as an odd number is one less, or one more than an even number.
4 0
3 years ago
7 + (a+b) = (7+a) +b what is the property
morpeh [17]

Answer:

Associative property of addition

Step-by-step explanation:

To “associate” means to connect or join with something. According to the associative property of addition, the sum of three or more numbers remains the same regardless of how the numbers are grouped.

4 0
4 years ago
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