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Aloiza [94]
3 years ago
10

PLEASE HELP AND ANSWER BOTH QUESTIONS

Mathematics
2 answers:
kati45 [8]3 years ago
5 0
1.)    16k^2 + 56kj + 49j^2


2.) 4y^2 - 36xy + 81x^2
nydimaria [60]3 years ago
3 0
D is your answer

Expand and do FOIL method (first outside inside last)
simplify and then choose right answer

A is your answer

Do the same thing

hope this helps
You might be interested in
The perimeter of a rectangle is given by P equals 2 l plus 2 w. Find the width of a rectangle whose length is 35 and perimeter i
maks197457 [2]
2l + 2w = P
l = 35,  P = 84,  w=?

2*35 + 2*w = 84
70 + 2w = 84
2w = 84 - 70
2w = 14
w = 14/2
w = 7 in
5 0
3 years ago
Can some one explain please​
inna [77]
What kind of question is this lol ? i don’t even understand it
7 0
3 years ago
In a right triangle ABC, CD is an altitude, such that AD=BC. Find AC, if AB=3 cm, and CD=√2 cm.
Zielflug [23.3K]

Given that triangle ABC is right angle triangle. CD is altitude such that AD=BC

ABC is a right angle triangle so apply Pythogorean theorem

AC^{2} + BC^{2} = AB^{2}

AC^{2} + AD^{2} = AB^{2}      (Given that AD = BC)

AC^{2} + AD^{2} = 3^{2}      (Given that AB=3)

AC^{2} + AD^{2} = 9 ...(i)

ADC is a right angle triangle so apply Pythogorean theorem

AD^{2} + CD^{2} = AC^{2}

AD^{2}+(\sqrt{2})^2= AC^{2}

AD^{2}+2= AC^{2}

AD^{2}=AC^{2} -2 ...(ii)


Plug value (ii) into (i)

AC^{2} + AC^{2}-2 = 9

2AC^{2} -2=9

2AC^{2} =11

AC^{2} =\frac{11}{2}

AC=\sqrt{\frac{11}{2} }


Hence final answer is AC=\sqrt{\frac{11}{2} }

8 0
3 years ago
Read 2 more answers
PLEASE HELP FAST!!!<br> ITS DUE IN 5 MINUTES
iragen [17]

Answer:

4800 dollars

Step-by-step explanation:

4000 multiply 0.2=800

4000+800=4800

3 0
3 years ago
Find the largest whole number which is a factor of both 42 and 98
LuckyWell [14K]

Answer:

14

Step-by-step explanation:

hope this helps

5 0
2 years ago
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