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stiv31 [10]
3 years ago
11

Evaluate the function for x=2:f(x)=7x-5

Mathematics
2 answers:
Alina [70]3 years ago
8 0
The answer will be 9. Beacuse 7×2 =14 and then 14 -5 = 9
Natali5045456 [20]3 years ago
7 0

The answer would be A) 9

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the variables x and y vary inversely with a constant variation of 7. Use the variation formula, k=xy, to find why when x=9
dolphi86 [110]

1.Make y the subject

k = xy

k/x = xy/x

y = k/x

2.Substitute

y = k/x

y = 7/9

y = 0.777......

y = 0.8 (Answer)

To confirm

k = xy

k = 9 × 0.8

k = 7.2

k = 7 (constant)

Hope it helps☺

7 0
3 years ago
What is the volume of the prism
Scilla [17]
Hey there :)

We know the volume formula of triangular prism
Volume = base x height of prism
             = \frac{1}{2} (base)(height)(height of prism)

We are given:
The base = 8 in
The height = 15 in
You do not need the 17 in ( it is there to trick you )
The height of the prism = 10 in

Apply the formula,
V = \frac{1}{2} (8)(15)(10)
   = 600 in³

Your final answer will be the last option

6 0
4 years ago
Doug’s family buys 7 postcards while on vacation. Each postcard costs 0.25$ including tax. How can Doug use the number line to f
larisa [96]

Answer: Total cost is $1.75

Explanation:

Since we have given that

Number of postcards bought by Doug's family= 7

Cost of each postcard including tax = $0.25

Total cost is given by

7\times 0.25=\$1.75

Now, we want to show this in number line :

On the number line put all the number with a difference of 0.25 and run the number line seven times and we get the answer.

Each step is of length 0.25 and there are 7 jumps to reach required answer.

So, after 7 jumps we reach at 1.75 which is the required answer.

Hence total cost is $1.75

3 0
3 years ago
Can u solve this for me ​
Studentka2010 [4]
X^2 + 4x + 16 is the answer
8 0
3 years ago
I need help finding the answer
Daniel [21]
6x = n²-16
n²-6x-16=0             -16=-8*2,    -6=-8+2
(n-8)(n+2)=0
n-8=0,   n+2=0
n=8,      n=-2
Negative solution is -2.
5 0
3 years ago
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