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Strike441 [17]
3 years ago
9

Mrs. Favicchio has 72 students in her science class. how many packets of pH paper does she need to order?

Mathematics
1 answer:
Ymorist [56]3 years ago
5 0
Okay, one, how many pieces are in each package, and two, how many pieces does each person need?
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Which graph best represents the function f(x)=2x ?
yan [13]

Answer:

B

Step-by-step explanation:

The best - well, only way- is to check a few points.

Namely -1 (unless your eyesight is really poor!), 0, 1, 2, and 3.

f(x) = 2^x\\f(-1) = 2^-^1 = \frac12\\f(0) =2^0 =1\\f(1)= 2^1=2\\f(2)=2^2=4\\f(3)=2^3= 8

Now you can mark all these points in each graph (well, you could if they were on paper and not on a screen) and see which one of the lines passes through all of them. Spoiler alert, it's the B graph.

A represents 2(2^x) = 2^{x+1}, B is the one you want, C is \frac{2^x}2 = 2^{x-1} and D looks like 4^x = 2^2^x

3 0
2 years ago
Write an equation in slope-intercept form and then in standard form for each line described. y-intercept -2; x-intercept 5
Xelga [282]
Hello
the line passes by A ( 0 ; -2)  and B (5 ; 0) equation : y = ax+b
a is a slop : a = (yb - ya)/(xb -xa)
a = (0+2)/(5-0)
a =2/5
y = (2/5)x+b
if x=5 and y= 0
0 = (2/5)(5)+b
b= - 2
the equation is : y = (2/5)x-2


5 0
3 years ago
Can you help me on question six?!
Amanda [17]

Answer: A (1:2)

Step-by-step explanation:

Since there are 12 puppies total and 8 of the puppies are yellow labs, there must be 12 - 8 = 4 black labs. Now, the ratio of black labs to yellow labs is 4:8 because there are 4 black labs and 8 yellow labs. However, we can simplify this ratio by dividing the entire ratio by 4. In this case, we would get (4/4):(8/4), which simplifies to 1:2, which is the answer.

4 0
3 years ago
Alexander has nickels, dimes, and quarters in the ratio of 2:1:8, if 40 of Alexander's coins are quarters, how many nickels and
ch4aika [34]

Answer:

He has 10 nickels and 5 dimes

Step-by-step explanation:

We can take advantage of the ratio by dividing 40 by 8, giving us that every 1 in the ratio = 5. So we can multiply 2 x 5 = 10 and 1 x 5 = 5.

Hope this Helps!

4 0
2 years ago
Each serving of a certain fruit snack contains 90 calories. Han wants to know how many calories he gets from the fruit snacks. W
Taya2010 [7]

Answer:

c=90(n)

Step-by-step explanation:

calories=90 calories times n servings

7 0
3 years ago
Read 2 more answers
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