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lina2011 [118]
2 years ago
5

I need help with the question above

Mathematics
1 answer:
Neporo4naja [7]2 years ago
4 0
2a/5b = 6

(2a-5b)/5b could be written as: (2a/5b) -(5b/5b)

Repace by its equivalent value (6) -(1) = 5

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Express y = -2x² - 4x + 7 in the form of perfect square and find the maximum points.
Marat540 [252]

Answer:

<em>Maximum: (-1,9)</em>

Step-by-step explanation:

<u>Vertex form of the quadratic function</u>

If the graph of the quadratic function has a vertex at the point (h,k), then the function can be written as:

y=a(x-h)^2+k

Where a is the leading coefficient.

We are given the following function:

y =-2x^2-4x+7

To find the vertex, we need to complete squares. First, factor -2 on the first two terms:

y =-2(x^2+2x)+7

The expression in parentheses must be completed to represent the square of a binomial. Adding 1 and subtracting 1:

y =-2(x^2+2x+1- 1)+7

Taking out the -1:

y =-2(x^2+2x+1)+2+7

Factoring the trinomial and operating:

y =-2(x+1)^2+9

Comparing with the vertex form we have

Vertex (-1,9)

Leading coefficient: -2

Since the leading coefficient is negative, the function has a maximum value at its vertex, i.e.

Maximum: (-1,9)

3 0
2 years ago
I need help plzz I don't know how to do this
Blizzard [7]
X greater than or equal to -7
7 0
3 years ago
Read 2 more answers
Juan Jiménez le debe a Luis  $15, a José le debe $ 8 y a Dana $ 20 y a Juan Jiménez le debe $ 17 Ana,  $ 5 Daniela y $ 21 Pedro.
Lapatulllka [165]

Answer :

Los dos debe y le deben porgue son diffirentes personas. Cuando le pagen los tres Ana, 'daniela y Pedro puede pagarle a Luis, Jose y Juan

Step-by-step explanation:

Juan debe un total de  $43 a Luis, Jose y  Juan

Ana, Daniela y Pedro  le deben  a Juan  un total de $43  

5 0
3 years ago
Ms. Skeen bought 3 pounds of candy for the Christmas party. There was a total of 147 pieces of candy. She wants to divide it amo
ohaa [14]

The 3 lbs of candy is irrelevant, so we can discard that. All you need to do is divide 147 by 26, which is 5.65 pieces of candy. Each student will get 5 pieces, with a few left over.

5 0
2 years ago
Find the distance between the following points.<br>a) (2,2) and (-3,1)<br><br>​
defon

Answer:

the distance between (2,2) and (-3,1) is \sqrt{26}, which is about 5.10.

Step-by-step explanation:

on a graph it shows that:

rise/run = 1/5

8 0
3 years ago
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