3 years ago

Whats the answer to this has me stumped

Mathematics

1 answer:

Thepotemich [5.8K]3 years ago

7 0

Ànswer is A
Where h=-6 and k=-5whereh k vertex of a parabola

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88.375

Step-by-step explanation:

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23 - (x) - 7 > ?

First: Multiply the number -1 from your sides to get the rest result for this set

Now, flip the inequality sign because we were multiplying from the negative number
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The difference of two numbers is 3. their sum is 13. find the numbers. creater the system and solve

erica [24]

Hey there :)

Let us translate the words into mathematics!

The difference of 2 numbers is 3
x - y = 3

The sum of 2 numbers is 13
x + y = 13

(eq. 1) x - y = 3
(eq.2) x + y = 13
eq. 1 + eq.2 ⇒ x - y = 3
+ x + y = 13 ( -y and +y cancels out )
2x = 16
$\frac{2x}{2} = \frac{16}{2}$
x = 8

We have the value of x, simply substitute it in either of the formulae to find y

x - y = 3 , 8 - y = 3 , 8 - 3 = y , 5 = y
x + y = 13 , 13 - 8 = y , 5 = y

x = 8 , y = 5

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