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Minchanka [31]
3 years ago
10

Your friend Ana received an 90% on a quiz. If Ana got 36 problems right, how many questions were in the quiz?

Mathematics
1 answer:
kherson [118]3 years ago
3 0

Answer:

40

Step-by-step explanation: I just guesstimated a number and divided 36 by 40 to get .9 which means 90%

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Given that x/1 = 3y/8, find the ratio of : y
brilliants [131]

Answer:

3 : 8

Step-by-step explanation:

\frac{x}{1} = \frac{3y}{8}

cross multiply

8x = 3y

x = 3/8

x : y = 3 : 8

5 0
3 years ago
Below are two different functions, f(x) and g(x). What can be determined about their slopes? f(x) Dawn writes 800 pages in 80 da
lilavasa [31]
Given function f(x) which is described by "<span>Dawn writes 800 pages in 80 days".

From this function we can notice that Dawn writes 0 pages in 0 days, (i.e. the initial point of the function is point (0, 0).

Recall that the slope, m, of a line passing through points:
(x_1,y_1) and (x_2,y_2)
is given by
m= \frac{y_2-y_1}{x_2-x_1}

Function f(x) passes through points (0, 0) and (80, 800).

Thus the slope of function f(x) is given by
m= \frac{800-0}{80-0} = \frac{800}{80} =10


Give function g(x), passing through points (2, -6) and (4, 12), the slope is given by
m= \frac{12-(-6)}{4-2} = \frac{12+6}{2} = \frac{18}{2} =9

It can be seen that the slope of f(x) and the slope of g(x) are close.
</span>
7 0
4 years ago
Find the value of the variable
Neporo4naja [7]

Answer:

x=6

Step-by-step explanation:

I would look at this triangle and notice that x can be solved by setting up a ratio.

I generally put the short side of the triangle on the top and the long side on the bottom

4/x = x/9

You then cross multiply to get 36=x^2, or +-6=x

A length of a triangle cannot be negative, so we are left with the answer x=6

8 0
3 years ago
It takes Betty 9 h to bake a cake and 8 h to knit a sweater. What is her opportunity cost of 1 cake in terms of knitted sweaters
trapecia [35]

Answer:78

Step-by-step explanation:

7 0
3 years ago
For the past 25 days, jonathon has read for n minutes each day. His total number of minutes read is 875. Write an equation to ex
liubo4ka [24]

Answer:

Required equation is: 25n = 875

Step-by-step explanation:

Let n be the number of minutes Jonathon read per day

Now

He read for 25 days and total 875 minutes

The equation will be:

25n = 875

We can solve this equation to find the number of minutes each day

Using Division property of Equality

\frac{25n}{25} = \frac{875}{25}\\n = 35

Hence,

Required equation is: 25n = 875

6 0
3 years ago
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