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3 years ago

I don't understand this

Mathematics

1 answer:

marta [7]3 years ago

5 0

We can start off by knowing that perimeter is all the sides added together. That means that (2 1/2 x 2) + ((2 1/2 + x) x 2) = 19.

It would be easier to make this into decimals. 2 1/2 is the same as 2.5. Multiply this by 2 and you get 5.

Now you can do 19 - 5 = 14.

This means the other 2 sides have to equal 14 so you write an equation.

2(2.5 + x) = 14.

When you simplify, you get 5 + 2x = 14.

Subtract 5 from both sides and you get 2x = 9.

Solve for x and you get x = 4.5.

Your answer is x = 4.5

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Brenna owns 9 T-shirts, 3 of which are red.

Ulleksa [173]

Answer:

1/3

Step-by-step explanation:

9 Shirts, 3 are Red

Probability: 3/9

Simplify: 1/3

5 0

3 years ago

- Write a recursive formula to represent the sequence below. (3,7, 11, 15, 19,23,27,31,35, ...)

NemiM [27]

The recursive formula to find nth term of sequence is:

$a_n = 4n - 1 \text{ where } n \geq 1$ and n = 1, 2, 3, ....

Solution:

Given a sequence is:

3, 7, 11, 15, 19, 23, 27, 31, 35

Let us find the difference between terms

7 - 3 = 4

11 - 7 = 4

15 - 11 = 4

19 - 15 = 4

23 - 19 = 4

27 - 23 = 4

31 - 27 = 4

35 - 31 = 4

Thus the difference between terms is constant

Thus the given sequence is arithmetic sequence

An arithmetic sequence is a sequence of numbers such that the difference of any two successive members of the sequence is a constant

The nth term of arithmetic sequence is given by:

$a_n =a_1+(n-1)d$

$a_n$ = the nᵗʰ term in the sequence

$a_1$ = the first term in the sequence

d = the common difference between terms

Here in the given sequence

d = 4

$a_1=3$

Substitute in above formula,

$a_n = 3 + (n-1)(4)\\\\a_n = 3 + 4n - 4\\\\a_n = 4n - 1$

Thus the recursive formula to find nth term of sequence is:

$a_n = 4n - 1 \text{ where } n \geq 1$ and n = 1, 2, 3, ......

8 0

3 years ago

Mateo has r more rubber bands than Eddie. Eddie has 26 rubber bands. Write an expression that shows how many rubber bands Mateo

serious [3.7K]

Well if you were smart you would know Mateo has 32 rubber bands but you ofc don’t 26 + r

3 0

2 years ago

Identify the roots of the function g(x) = x^2 - 8x + 16

amm1812

Only 4 because result is (x-4)(x-4) that means (x-4)^2=0
So
X-4=0
X=4

8 0

3 years ago

What is the difference between 3/7 and 1/14 A 1/2 B 4/14 C 5/14 D 9/14

Cerrena [4.2K]

C. 5/14
You find the LCD. In this case it would be 14 since both 7 and 14 can go into 14. You have to multiply the top by the same number as the bottom. 2*7=14
2*3=6. You now have 6/14. 6-1=5
The denominator stays the same. 5/14

8 0

3 years ago

I don't understand this​

I don't understand this