PLEASE HELP WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

Mathematics

1 answer:

Alecsey [184]4 years ago

3 0

Answer:

x= 56 degree

Step-by-step explanation:

sin x= opposite/ hypotenuse

sin x= 66/79

sin x=0.84

sin-1(0.84)= x

x= 56 degree

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PLEASE HELP ME ASAP!!!!

yKpoI14uk [10]

Part A

$\overline{AC}$ and $\overline{BD}$

Part B

Diagonals of a parallelogram bisect each other, so

$BE=ED \implies 2x+3=3y-4 \implies 3y=2x+7 \implies y=\frac{2}{3}x+\frac{7}{3}\\\\AE=EC \implies y+4=4x-6 \implies y=4x-10$

Solving by substitution,

$\frac{2}{3}x+\frac{7}{3}=4x-10$

Multiplying both sides by 3,

$2x+7=12x-30\\\\37=10x\\\\x=3.7$

So, $y=\frac{2}{3}\left(\frac{37}{10} \right)+\frac{7}{3}=\frac{24}{5}$

Part C

$BE=ED=2(3.7)+3=10.4\\\\AE=EC=4(3.7)-6=8.8$

$\therefore BD=2(10.4)=20.8, AC=2(8.8)=17.6$

5 0

2 years ago

Simplify: x^2-49

Softa [21]

For x^2-49
this is a diffarence of two perfect squares. I suggest that this is memorised.
a^2-b^2=(a-b)(a+b)
so x^2-7^2=(x-7)(x+7)

so to solve x^2+x-56 you want to find out what two numbers add to 1 and multiply to make -56
since -56 is negative we know that the two number are difarent signs so that eliminatess answers B and D.
if we try answer C -8+7=-1 so the answer is not C because we want +1 not -1
then we see that 8+(-7)=1 so the answer is A

5 0

3 years ago

Read 2 more answers

Select Independent or Not independent for each description of events.

lbvjy [14]

If A and B are independent, then P(A and B) = P(A) * P(B).

Then the probability that A occurs given that B occurs, for example, reduces to the probability that A occurs by itself:

$P(A\mid B)=\dfrac{P(A\cap B)}{P(B)}=\dfrac{P(A)P(B)}{P(B)}=P(A)$