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3 years ago

Help me with this hehe

Mathematics

2 answers:

Nonamiya [84]3 years ago

7 0

Can we have the answer choices? I believe it would be 100° but the answer choices would really help :)

sergey [27]3 years ago

6 0

It would be 100 because two parallel lines intersecting make a weird looking x that adds up to 360 so if one side was 80 that means another side was 80 which adds up to 160 so we gotta turn that 160 into a 360 you need 200 more and there are 2 sides left so 200/2 equals 100

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Please help me. I can’t do it

Maslowich

Answer: A) -8

B) - 41

C) - 39

Step-by-step explanation:

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2 years ago

David, Egil and Frances share money in the ratio 2:7:9. Frances gets ?80 more than David. Explain how you know Egil gets ?80.

Natalija [7]

Step-by-step explanation:

We have been given that David, Egil and Frances share money in the ratio 2:7:9.

Let 2x, 7x and 9x be the amounts of money that David, Agil and Frances get respectively.

We are told that Frances gets $80 more than David. So we can write this information in an equation as:

$9x=2x+80$

Now let us solve for x.

$9x-2x=80$

$7x=80$

$x=\frac{80}{7}$

Now let us substitute $x=\frac{80}{7}$ in 7x (amount of money that Egil gets).

$\text{ Amount of money that Egil will get}=7\cdot \frac{80}{7}$

Upon cancelling out 7 from numerator and denominator we will get,

$\text{ Amount of money that Egil will get}=80$

Therefore, Egil will get $80.

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3 years ago

What is 5⅜ - 3⁸/⁹ ?

lesya692 [45]

Answer:

1 35/72

Step-by-step explanation:

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3 years ago

A leak in a pool causes the height of the water to decrease by 0.25 foot over 2 hours. After the leak is fixed, the height of th

lana [24]

Answer:

5 feet

Step-by-step explanation:

Add 0.25 to both sides of the equation:

4.75 +0.25 = x - 0.25 +0.25

5.00 = x

The original height of the water in the pool was 5.00 feet.

7 0

3 years ago

Read 2 more answers

The function f(x) is an increasing function about which little else is known about other than f(2)=7 and f'(2)=5. Find (f^-1)'(7

andreyandreev [35.5K]

Since f(x) is (strictly) increasing, we know that it is one-to-one and has an inverse f^(-1)(x). Then we can apply the inverse function theorem. Suppose f(a) = b and a = f^(-1)(b). By definition of inverse function, we have

f^(-1)(f(x)) = x

Differentiating with the chain rule gives

(f^(-1))'(f(x)) f'(x) = 1

so that

(f^(-1))'(f(x)) = 1/f'(x)

Let x = a; then

(f^(-1))'(f(a)) = 1/f'(a)

(f^(-1))'(b) = 1/f'(a)

In particular, we take a = 2 and b = 7; then

(f^(-1))'(7) = 1/f'(2) = 1/5

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2 years ago