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lesya692 [45]
3 years ago
6

What is ( 3.1 x 10^5) ( 2.2 x 10^7) in scientific notation?

Mathematics
1 answer:
hjlf3 years ago
8 0

Answer:

= 2.231 × 107

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(Marking Brainliest) What is the vertex form of the equation?<br><br>y = x^2 - 4x + 7​
AysviL [449]

Step-by-step explanation:

y = x² - 4x + 7

the general vertex form is

y = m(x-h)² + k

to bring the part "x² -4x" to an expression of (ax + b)² we need to add 4, as "x² - 4x + 4" = (x - 2)².

and since we add 4 there, we need to subtract 4 overall again to keep the value of the expression the same :

y = x² - 4x + 4 + 7 - 4 = (x - 2)² + 7 - 4 = (x - 2)² + 3

and so, that is the vertex form :

y = (x - 2)² + 3

4 0
2 years ago
Question 2 (Essay Worth 10 points)
sashaice [31]
Ryan is correct, the mean is about 8.1.

To find the mean, you have to add up all the values, then divide by the total amount.

For Sample A:
60 x 6 + 90 x 7 + 145 x 8 + 150 x 9 + 55 x 10 = 4050

If you add up all the adults, you have 500.

Dividing 4050 by 500 = 8.1

Sample B will produce a very similar result.
5 0
3 years ago
Jocelyn is pregnant and needs to eat at least 500 more calories a day than usual. when buying groceries one day with a
stiks02 [169]
90b + 150g > 500

0.35b + 2.50g < 15.00

what, is the question asking. These might help
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2 years ago
Need this for my teacher
ra1l [238]
I believe you combine the first and last terms first because they have the same denominator
4 0
2 years ago
Read 2 more answers
X+5/x^2+x-12 <br> What are the restrictions for x
soldier1979 [14.2K]

x ≠ - 4, 3

the denominator of the fraction cannot equal zero as this would make the fraction undefined. Equating the denominator to zero and solving gives the values that x cannot be

solve x² + x - 12 = 0

(x + 4)(x - 3) = 0

equate each factor to zero abd solve for x

x + 4 = 0 ⇒ x = - 4

x - 3 = 0 ⇒ x = 3

restrictions on x are : x ≠ - 4, 3


6 0
3 years ago
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