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Deffense [45]
3 years ago
12

Evaluate 2a - 7 when a=3

Mathematics
1 answer:
Eddi Din [679]3 years ago
7 0

Answer:

-1

Step-by-step explanation:

Just substitute your variable in:

(2)(3)-7

Simplify:

2*3=6

6-7=-1

-1 is your answer.

-Stay golden :)

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2x^3=28<br><br> find the exact solution for x
Alborosie

Answer:

The answer to your question is:  x = 2.41

Step-by-step explanation:

                                            2x³ = 28

                                             x³ = 28/2

                                             x³ = 14

                                             x = ∛14

                                            x = 2.41

6 0
3 years ago
A fifteen-foot tree growing in a fence row is used as a fence post, to which barbed wire is stapled at a height of five feet. Ye
Tanya [424]

Answer:

The fence will still be five feet high because the lengthening of the tree occurs at the apical meristem

Step-by-step explanation:

This is a simple and quick question to solve

years later after the tree is now thirty feet high,  The barbed wire has been initially stapled at a height of five feet.

However a tree increases from its apical meristem therefore the barbed wire fence will still remain at that same height of five feet high.

6 0
3 years ago
the attendance of your club increased by 30% from last year. there are 195 people in the club now. a. write a proportion to find
astra-53 [7]

Answer:

A.

\dfrac{x}{195}=\dfrac{100}{130}

B. 150

Step-by-step explanation:

Let x be the number of people at the club last year.

The attendance of your club increased by 30% from last year. This means that if the last year attendance was 100%, this year attandance is 100% + 30% = 130%

Thus,

x people - 100%

195 people - 130%

A. Write a proportion:

\dfrac{x}{195}=\dfrac{100}{130}

B. Cross multiply:

130\cdot x=100\cdot 195\\ \\130x=19,500\\ \\13x=1,950\\ \\x=\dfrac{1,950}{13}=150

4 0
3 years ago
Which statement is true?
max2010maxim [7]

Answer:

a

Step-by-step explanation:

8 0
3 years ago
 Write a function with a zero of 1/2 . Explain how you know.
nalin [4]

Answer:

Simplest function is f(x) = 2x - 1

Step-by-step explanation:

When a function has a zero, simply put, that point is where the graph goes through the x-axis.  At this point, the y value is 0.

If a function has a 0 of 1/2, that translates to x = 1/2 and also (1/2, 0).  That means that y = 0 when x = 1/2.

If x = 1/2 and is a zero, then x - 1/2 = 0 and 2x - 1 = 0 (notice that y = 0 here and solving for x would get you right back to x = 1/2).

The simplest function with a zero of 1/2 is

f(x) = 2x - 1

You know it is true that the zero is 1/2 for two reasons.  First one is to set the right side equal to 0 and solve for x.

The second one is to graph the line y = 2x - 1 and see that it goes through the x axis at 1/2 where y = 0.

6 0
4 years ago
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