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Gennadij [26K]
3 years ago
8

I'm an idiot. How do you know the difference between a quadratic and exponential equation just by looking at it without a graph?

(Please dummy it down for me because I have read the lesson 5 times and still don't understand it.)
Mathematics
1 answer:
Zepler [3.9K]3 years ago
5 0

Answer:

It's easy

Step-by-step explanation:

An exponential equation always has x as an exponent so just look for it

Ex:x+2=0(quadratic)                                                                                    Ex:2^x=0(exponential)

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Twice the difference of a number and 7 equals 5
RideAnS [48]

Hey there!

Let's write an equation given this information. We will use x to represent the number.

2(x-7)=5

Now, we use the distributive property to remove the parentheses.

2x-14=5

Now, we add 14 to both sides.

2x=19

We divide both sides by 2.

x=9.5

Therefore, our number is 9.5

I hope this helps!

4 0
3 years ago
I cant believe how bad my brother, Reuben, is at growing things. He bought a whole bunch of plants at the nursery the other day.
jeka94

Answer:

68 plants.

Step-by-step explanation:

Let x represent the number of plants that Reuben bought from the nursery.

We have been given that Reuben bought a whole bunch of plants at the nursery the other day. Right away, five died. So number of plant left would be x-5.

We are also told that then our dog dug up 2/9 of them. So number of plants left after dug-up would be \frac{2}{9}(x-5).

Further a rabbit came and ate ½ of what was left. So number of plants left would be \frac{\frac{2}{9}(x-5)}{2}=\frac{2}{9\times 2}(x-5)=\frac{1}{9}(x-5).

Since Reuben had only 7 plants left, so we will equate our expression with 7 and solve for x as:

\frac{1}{9}(x-5)=7

9\times \frac{1}{9}(x-5)=7\times 9

x-5=63

x-5+5=63+5

x=68

Therefore, Reuben bought 68 plants at the nursery.

6 0
3 years ago
For the following equation, compute the x- and y- intercepts to graph the line.
nikklg [1K]
X-intercept: (-5,0)
Y-intercept: (0,4)
To solve for the X-Intercept, substitute 0 for y and solve for x.
To solve for the Y-Intercept, substitute 0 for x and solve for y.

7 0
3 years ago
Audrey bought shoes that were on sale for 70% off the regular price. Audrey saved $42.
solniwko [45]
60 because .7 times 60 equals 42 therefore the answer is 60
5 0
2 years ago
Read 2 more answers
Answer this question show you’re work
Svetlanka [38]

Answer:

Step-by-step explanation:

The answer is x=-4 the work is shown on the pic

8 0
3 years ago
Read 2 more answers
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