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vovangra [49]
3 years ago
11

I need to know how to do this problem

Mathematics
2 answers:
Viktor [21]3 years ago
7 0

Answer:

15

Step-by-step explanation:

Free_Kalibri [48]3 years ago
5 0

Answer:

x = 15

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask

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If x-y = 40 and x+y = 70, then what is the value of x squared -y squared ?
OlgaM077 [116]

Let's see what to do buddy...

____________________________

Reminder:

(a + b)(a - b) =  {a}^{2} -  {b}^{2}

So we need to just Multiply above equations like this :

x + y = 70

x - y = 40

(x + y)(x - y) = 70 \times 40

{x}^{2} -  {y}^{2} = 2800

____________________________

And we're done.

Thanks for watching buddy good luck.

♥️♥️♥️♥️♥️

7 0
3 years ago
two groups go to a sporting event. The first buys 2 tickets and 1 child ticket for $39. The other buys 3 adult tickets and 1 chi
dexar [7]
$17 for an adult ticket
7 0
3 years ago
Given: f(x) = X2 - 3 and g(x)= x+1 The composite function g.f is
Minchanka [31]

Answer:

option (c)

Step-by-step explanation:

g.f= g(f(x))

= g(x2 -3)

= (x2 -3)+1

=x2 -2

7 0
3 years ago
Read 2 more answers
SOMEONE PLEASE JUST ANSWER THIS FOR BRAINLIEST!!’
ad-work [718]

Factoring this expression using the identity of a²-b² = (a+b)(a-b)

Given :-

25 - x²

<em>This can be broken down into:- </em>

... ( 5 )² - ( x )²

<em>In this case, a is 5 and b is x </em>

... ( 5 + x ) ( 5 - x ) Is the answer.

Hope it helps!!

7 0
2 years ago
Read 2 more answers
Eric created a rectangular patio using 1-Foot square paving stones,which are sold in batches by the dozen.The patio measures 7 f
Paladinen [302]
His patio needs 56 stones because 8 multiplied by 7 equals 56. So if the paving stones are sold in batches of 12 (a dozen is equal to 12) then we need to find how many times 12 goes into 56. 12 cannot go into 56 evenly, but 12x5=60 which will be more than enough stones for Eric's patio. So Eric will need 5 batches of paving stones for his patio.
7 0
2 years ago
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