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2 years ago

NEED HELP AND RIGHT ANSWER DONT RUSH! REWARD BRAINLIEST

Mathematics

2 answers:

miskamm [114]2 years ago

8 0

Answer:

1.) x = 49 or x = -49

2.) x = -1/2 or x = -5

Naddika [18.5K]2 years ago

6 0

4. y=(x+7)(x-7) so the last one I think idfk I just factored it
5. Y = (2x+1) (x-5)

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Expand and simplify 6(2x - 3) -2 (2x + 1)

Komok [63]

Answer:

8x-20

Step-by-step explanation:

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3 years ago

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Triangle E F G is shown. Which statements regarding Triangle E F G are true? Select three options. E F + F G greater-than E G E

Leokris [45]

Answer:

options 1 ( E F + F G greater-than E G ), 2 (E G + F G greater-than E F ) and 5 ( E G + E F less-than F G ) are true.

Step-by-step explanation:

Given triangle EFG.

In each tirangle with sides lengths a, b and c, we always have

$a+b>c\\ \\a+c>b\\ \\b+c>a$

In triangle EFG:

$EF+FG>EG;$
$EG+GF>EF;$
$FE+EG>FG.$

So, options 1 ( E F + F G greater-than E G ), 2 (E G + F G greater-than E F ) and 5 ( E G + E F less-than F G ) are true.

Options 3 and 4 are false.

4 0

3 years ago

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Work out the size of angle x 126 degrees exterior and 43 degrees interior

grigory [225]

Answer:

The answer is 83°

Step-by-step explanation:

by the sum of iner and outer angle=180°

180-126= 54°

x=180-43+54

x=180-97

x=83°

hope that helped.?<3

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2 years ago

I’ll mark you brainliest!!!!! Which situation shows a constant rate of change?

Irina-Kira [14]

Answer:

Step-by-step explanation:

If we make a graph comparing the total cost of the milk and the gallons bought, it will be a straight line, which is a constant rate of change.

4 0

3 years ago

Tim must read 2 books from a list of 7 recommended books for his summer reading program. In how many different ways can Tim choo

Marianna [84]

There are 21 ways Tim choose 2 books from the 7 recommended book

Solution:

Given that Tim must read 2 books from a list of 7 recommended books for his summer reading program

To find: different ways can Tim choose 2 books from the 7 recommended books

This is a combination problem

A combination is a selection of all or part of a set of objects, without regard to the order in which objects are selected

The formula for combinations is:

$n C_{r}=\frac{n !}{r !(n-r) !}$

where n represents the number of items, and r represents the number of items being chosen at a time

Here we have to choose 2 books from 7 books

Therefore, n = 7 and r = 2

Substituting values in above formula, we get

$\begin{aligned}&7 C_{2}=\frac{7 !}{2 !(7-2) !}\\\\&7 C_{2}=\frac{7 !}{2 ! \times 5 !}\end{aligned}$

For a number n, the factorial of n can be written as,

$n !=n \times(n-1) \times(n-2) \dots \dots \times 2 \times 1$

Therefore, we get

$7 C_{2}=\frac{7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}{2 \times 1 \times 5 \times 4 \times 3 \times 2 \times 1}\\\\7C_2 = 7 \times 3 = 21$

Thus there are 21 ways Tim choose 2 books from the 7 recommended book

7 0

3 years ago