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Reika [66]
3 years ago
12

A(1) = -13 a(n-1) + 4 find the 2nd term in the sequence

Mathematics
1 answer:
kirill115 [55]3 years ago
5 0

Solution

The sequence is an Arithmetic sequence.

Here the 1st term = -13

An = A(n-1) + 4

Therefore, the common difference (d) = 4

2nd term = first term + common difference

2nd term = -13 + 4 = -9

The answer is -9.

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For what values of x is the following equation satisfied : 3x+9 = 21+7x ?
olya-2409 [2.1K]
First of all, the first power of 'x' is the highest power in the whole equation,
so we only expect one solution.

You said that <span><u>3x+9 = 21+7x </u>

Subtract 3x from each side:

9 = 21 + 4x

Subtract 21 from each side:

-12 = 4x

Divide each side by 4 :

<u>-3 = x </u>
</span>


4 0
3 years ago
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Answer for brainliest
Lelu [443]

Answer:

red area = 7.74 in^2

Step-by-step explanation:

area of square = 6x6 = 36

radius = 1/2 diameter, radius = 3

area of circle = (3.14)(3^2) = 28.26

36-28.26 = 7.74

3 0
3 years ago
At Shop A, 2 pounds of crawfish costs $6. At Shop B, 5 pounds of crawfish costs $15. What is the unit price for crawfish at Shop
ruslelena [56]

Answer:

The unit price for for crawfish at Shop A is $3 per pound and Shop B is also $3 per pound

Step-by-step explanation:

6/2=3

15/5=3

3 0
3 years ago
The coordinates G(7,3), H(9, 0), (5, -1) form what type of polygon?
Marrrta [24]

Answer:

Is an acute triangle

Step-by-step explanation:

we know that

the formula to calculate the distance between two points is equal to

d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}

we have

G(7,3), H(9, 0), I(5, -1)

step 1

Find the distance GH

substitute in the formula

d=\sqrt{(0-3)^{2}+(9-7)^{2}}

d=\sqrt{(-3)^{2}+(2)^{2}}

GH=\sqrt{13}\ units

step 2

Find the distance IH

substitute in the formula

d=\sqrt{(0+1)^{2}+(9-5)^{2}}

d=\sqrt{(1)^{2}+(4)^{2}}

IH=\sqrt{17}\ units

step 3

Find the distance GI

substitute in the formula

d=\sqrt{(-1-3)^{2}+(5-7)^{2}}

d=\sqrt{(-4)^{2}+(-2)^{2}}

GI=\sqrt{20}\ units

step 4

Verify what type of triangle is the polygon

we know that

If applying the Pythagoras Theorem

c^{2}=a^{2}+b^{2} ----> is a right triangle

c^{2}> a^{2}+b^{2} ----> is an obtuse triangle

c^{2}< a^{2}+b^{2} ----> is an acute triangle

where

c is the greater side

we have

c=\sqrt{20}\ units

a=\sqrt{17}\ units

b=\sqrt{13}\ units

substitute

c^{2}= (\sqrt{20})^{2}=20

a^{2}+b^{2}=(\sqrt{17})^{2}+(\sqrt{13})^{2}=30

therefore

c^{2}< a^{2}+b^{2}

Is an acute triangle

6 0
3 years ago
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What property could be used to solve 6x=72
katovenus [111]
There is no property that can be used but you can find the answer by dividing 72 and 6

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