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3 years ago

HELPPPPPPPP!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

dmitriy555 [2]3 years ago

4 0

Answer:

Step-by-step explanation:

- 14 + 30 / 4

16 / 4

16 ÷ 4

= 4

^-^

natita [175]3 years ago

3 0

Answer:

Step-by-step explanation:

-2×7=-14

-2×15=-30

-14--30=16

16÷4=4

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For any parallelogram what is not always true

tresset_1 [31]

Answer:

The diagonals are congruent.

Step-by-step explanation:

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2 years ago

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You are on a game show and you are given the choice of three doors. Behind one door is a car (the main prize). Behind each of th

makvit [3.9K]

Answer:

You need to switch doors.

Switching the door has higher probability of winning.

Step-by-step explanation:

Consider the provided information.

Suppose there are 3 doors, A, B and C

Behind one door is a car that means the probability of getting a car is 1/3

Suppose you select door A

The probability that the it has a goat is 2/3. That means it is very likely to be a goat behind door A.

The other two door(B and C) are more likely to contain a goat and car.

The host opens another door which has a goat behind it. Let say he open the door B.

Now there is more chance to be a car behind it as compare to the previous choice.

Thus, you need to switch doors.

Switching the doors will gives you 2 in 3 chance of winning while staying with same door will gives you 1 in 3 chance of winning.

Switching the door has higher probability of winning.

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3 years ago

At a local college, 65 female students were randomly selected and it was found that their mean monthly income was $628 with a st

kramer

Answer:

Step-by-step explanation:

Download docx

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3 years ago

The largest set of x values satisfying

velikii [3]

Answer:

If $p\ge -\dfrac{1}{3},$ then $x>\dfrac{2}{3}+p$ and $mn=\dfrac{2}{3}+p=\left(\dfrac{2}{3}+p\right)\cdot 1,\ \ m+n=\dfrac{5}{3}+p$

Step-by-step explanation:

Solve two inequalities for x.

1. $2,018x-p$

Separate terms with x and without x into two sides:

$2,018x-2,020x$

Multiply by -1:

$2x>-2p\\ \\x>-p$

2. $7x+3p$

Separate terms with x and without x into two sides:

$7x-10x$

Multiply by -1:

$3x>2+3p\\ \\x>\dfrac{2}{3}+p$

Find the largest set of x values satisfying both inequalities:

$x>-p\\ \\x>\dfrac{2}{3}+p$

$-p>\dfrac{2}{3}+p\\ \\-2p>\dfrac{2}{3}\\ \\2p$

then $x>-p$ and $mn=-p=p\cdot (-1),\ m+n=p-1.$ In this case both m and n are negative.

If $p>-\dfrac{1}{3},$ then $x>\dfrac{2}{3}+p$ and $mn=\dfrac{2}{3}+p=\left(\dfrac{2}{3}+p\right)\cdot 1,\ \ m+n=\dfrac{5}{3}+p$

If $p=-\dfrac{1}{3},$ then $x>\dfrac{1}{3}$ and $mn=\dfrac{1}{3}=\dfrac{1}{3}\cdot 1,\ \ m+n=\dfrac{4}{3}$

7 0

3 years ago

What is the sum of the arithmetic sequence 8, 15, 22 …, if there are 26 terms?

11111nata11111 [884]

Since the sequence is arithmetic, we have an expression of the form:
$an = a1 + d (n-1)
$
Where,
a1: first term of the sequence
d: common difference
n: number of terms
We look for the common difference:
$d = 22-15 = 15-8 = 7

d = 7$
Then, setting values we have:
$a26 = 8 + 7 * (26-1)

a26 = 183
$
Then, the sum of the terms is:
$Sn = ((a1 + an) / (2)) * n
$
Substituting values:
$Sn = ((8 + 183) / (2)) * 26

Sn = 2483$
Answer:
the sum of the arithmetic sequence 8, 15, 22 is:
Sn = 2483

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3 years ago