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user100 [1]
3 years ago
5

To describe a specific arith-

Mathematics
1 answer:
Bezzdna [24]3 years ago
4 0

Answer:

f(x) = 7x + 30

Step-by-step explanation:

We need at least two points to write the equation of a straight line.

The recursive formula that Elijah wrote is:

f(0) = 30

f(n + 1) = f(n) + 7

When we substitute n=0, we get:

f(0 + 1) = f(0) + 7

f(1) = 30 + 7

f(1) = 37

The points (0,30) and (1,37) lies on this line.

The equation of this line is of the form:

f(x) = mx + b

where b =30 is the y-intercept and m=7 is the slope.

We plug in these values to get:

f(x) = 7x + 30

Note that the slope of the line is equal to the common difference of the Arithmetic Sequence.

You could also use the two points to find the slope:

m =  \frac{37 - 30}{1 - 0}  = 7

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Someone please help me with the perimeter and area of this problem
Tcecarenko [31]

Answer: Perimeter = 40

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Step-by-step explanation:

Perimeter is the sum of all the sides:

    11 + 12 + 17 = 40

The area of a triangle is 1/2 base x height

   1/2( 17 x 24)

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5 0
2 years ago
Let a be a rational number and b be an irrational number. Is a + b rational or irrational?
Svetlanka [38]

Answer:

irrational

Step-by-step explanation:

because an irrational number goes on forever so no matter what number is added to it it will always be irrational.

4 0
3 years ago
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9/v=3/30 v=__<br> solve the proportion.
Nadya [2.5K]
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3×3=9
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3 years ago
If EG and HJ are parallel lines and mEFI = 130°, what is mGFD?
padilas [110]

Answer:

if EG || HJ,

m GFD = 130°

Step-by-step explanation:

Because, m EFI = m GFD

( vertical opposite angles )

so, m GFD = 130°

3 0
2 years ago
In the sale, jumpers are on the offer "buy 2, save a third of the price". Jeans are also currently 30% off. Jumpers cost £45 eac
Alinara [238K]

Answer:

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Step-by-step explanation:

Jumpers: 45 x 2= 90

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Jeans:

50 x 2=100

100-30%=70

Add together

70+60=130


3 0
3 years ago
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