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Oxana [17]
2 years ago
8

Need help on #18 & #19 please

Mathematics
1 answer:
aliina [53]2 years ago
3 0

Answer:

18: x=2 y=2.5

19: y = 0.5

Step-by-step explanation:

2(2)=4

2.5(2)=5

4+5=9

2×0.5=1

You might be interested in
The sum of the squares of two consecutive positive even integers is 52.Find the integers
ankoles [38]

Answer:

The two consecutive positive integers are 4 and 6.

Step-by-step explanation:

Let x be an even integer, then the next even integer is (x+2).


The sum of the squares of these even integers is 52.


We can write the following equation and solve for x.


x^2+(x+2)^2=52.

We expand to get,

x^2+x^2+4x+4=52.

We simplify to get,

2x^2+4x+4-52=0.


This gives us,

2x^2+4x-48=0


We divide through by 2 to get,

x^2+2x-24=0.

This is now a quadratic trinomial

We split the middle term to get,


x^2+6x-4x-24=0.


We factor to obtain,

x(x+6)-4(x+6)=0


\Rightarrow (x+6)(x-4)=0


\Rightarrow (x+6)=0 or (x-4)=0


\Rightarrow x=-6 or x=4


We discard x=-6 since it is not a positive integer.

\therefore x=4


Hence the two consecutive positive even integers are,

4

and

4+2=6








5 0
3 years ago
Read 2 more answers
Can someone answer this and explain how they got the answer? I am really confused.
Pachacha [2.7K]

Answer:

Looking like fun too.

Step-by-step explanation:

3 0
2 years ago
Please help me with this
Anika [276]

Answer:

Just search from other websites

Step-by-step explanation:

easy

4 0
2 years ago
Plz help ITS NOT A LOT !!!!!! Plz help
padilas [110]

Answer: Actually, you must use the Pythagorean Theorem!

a squared plus b squared equals c squared. So if you substitute in the values, a is 2 units and b is three units. 2 squared is 4 and 3 squared is 9.

4 + 9 = 13 so the answer is the square root of 13. (√13)

3 0
2 years ago
Can some one plz help I'm comfuzzled
scZoUnD [109]

14+ 13y - 13y = 20y - 13y -21 (taking away the smallest y value from both sides)

14 = 7y - 21

14 + 21 = 7y - 21 +21 (+21 on both sides to remove -21 if we do -14 then we will have nothing on other side)

35 = 7y

35/7 = 7y/7 (dividing 7 on both sides)

5 = y

answer is 100% correct no doubts. hope it helped you.

5 0
2 years ago
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