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exis [7]
3 years ago
8

After getting 5 new rocks, George gave half of his rock collection to Susan. If George gave Susan 36 rocks, which equation could

be used to determine how many rocks George started with?
                    
Mathematics
2 answers:
Mazyrski [523]3 years ago
8 0

Answer:

C

Step-by-step explanation:

kirill115 [55]3 years ago
4 0
Let x be the number of rocks that George have at first.

First, George have x rocks. Then, he gets 5 new rocks. So, we have:
x + 5
Next, half of his rock collection is given to Susan.
\frac{x + 5}{2}

Susan got 36 rocks, so the equation is
\frac{x + 5}{2}  = 36
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Choose the answer that validates that the rate of change is constant by showing that the ratios of the two quantities are propor
docker41 [41]

Given:

The table of values is

Number of Students   :  7    14   21    28

Number of Textbooks : 35  70  105  140

To find:

The rate of change and showing that the ratios of the two quantities are proportional and equivalent to the unit rate.

Solution:

The ratio of number of textbooks to number of students are

\dfrac{35}{7}=5

\dfrac{70}{14}=5

\dfrac{105}{21}=5

\dfrac{140}{28}=5

All the ratios of the two quantities are proportional and equivalent to the unit rate.

Let y be the number of textbooks and x be the number of students, then

\dfrac{y}{x}=k

Here, k=5.

\dfrac{y}{x}=5

y=5x

Hence the rate of change is constant that is 5.

8 0
3 years ago
Please halp. i am not smart
Leya [2.2K]

Let's start with 22-C!

To figure out the problem, let's establish what it's asking. It wants to know the one time fee of using the trash dumpster. Your teacher may have taught you a better way to do this, but I'll show you how to solve it via logic.

We first need to set up a basic equation. X will be the unknown fee, 195 will act as the total, and 9(15) will represent the remaining cash (you get this from 15$ an hour for 9 hours).

The equation should look something like this:

x + 9(15) = 195 OR (simplified) x + 135 = 195.

At this point we can solve it like a regular equation. Subtract 135 on both sides:

x = 60. Therefore, the fee for using the dumpster is 60$.

Now we can move on to 23-A & B!

First, let's go over 2 basics: point slope formula and slope intercept.

Point slope formula: <em>y - yy-y_{1} = m(x - x_{1} )</em>

Slope intercept: <em>y = mx + b</em>

We know that .5 is the slope because it's dependent on an amount of time (or dependent in general). 64 can be used as y1 and 48 as x1.

The formula would be: y - 64 = .5(x - 48).

As for part B, we plug in the same numbers! We've previously found that .5 is the slope (m) and it appears you already know that the y-intercept (b) is 40. Plug it in like so:

y = .5x + 40

All of the answers are bolded, I hope this helped!

6 0
3 years ago
Please help I’ll make you a branliest!!!!!!!
masya89 [10]

Answer:

2 answer is right

Step-by-step explanation:

I think

7 0
3 years ago
Can someone please help me? 100% sure please
Nataliya [291]
Part A

Distribute the one-half.

1.24g + 0.87m + 0.98z

Part B

(29.68 - x) + 14.45

Or simplified to 44.13 - x

Part C

a = number of times at the store
b = gloves' price
c = hat's price
6 0
3 years ago
Read 2 more answers
2
MArishka [77]

Answer:

D

Step-by-step explanation:

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6 0
2 years ago
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