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Kitty [74]
2 years ago
8

Please help me I will give you extra points and the brain thing

Mathematics
1 answer:
vovangra [49]2 years ago
4 0

Answer:

A. n = 5

Step-by-step explanation:

S = n² + n

When S = 30:

                                                       n² + n = 30

Subtract 30 from both sides:  n² + n - 30 = 0

Factorize:                               (n - 5)(n + 6) = 0

Therefore                                                 n = 5 or -6

As n > 2, then n = 5 only

You might be interested in
4. I am a multiple of 7, I am between 50 and 70. Who could I
never [62]

Question 4.

The multiples of 7 are those numbers obtained from the product of 7 and a whole number.

The multiples of 7 between 50 and 70 are:

\text{ 56 and 63}

You could be 56 or 63

5 0
1 year ago
!MATH EMERGENCY PLEASE ANSWER CORRECTLY
hram777 [196]

Answer:

It is the last one.

Step-by-step explanation:

With a problem like this you must rank highest to lowest and add anything that has the same look. Take 2squared and 5 squared for example, They both are squared so you can add them. Hope this Helped.

6 0
3 years ago
In 1985, the cost of clothing for a certain familiy was $620. In 1995, 10 years later, the cost of clothing for this famility wa
Sholpan [36]

Answer:

$848

Step-by-step explanation:

Calculation for the cost of this familiy's clothing in 1991

First step is to calculate the amount that is increase per year

Increase per year= ($1000-$620)/(1995-1985)

Increase per year= 380/10

Increase per year= $38

Now let y be :38*x + $620 and let x be 6 years (1991-1985)

Second step is to calculate the cost of the clothing in 1991

y = 38*6 + 620

y=228+620

y = $848

Therefore the cost of this familiy's clothing in 1991 will be $848

6 0
3 years ago
Plssssss help me with this math pls
sdas [7]

Answer:

The correct answer is A) 4/663.

Step-by-step explanation:

First you find the probability of drawing a queen when drawing a single card from a deck of 52 cards. Since there are 4 queens(the queen of diamond, the queen of hearts, the queen of spades, and the queen of clubs) in a deck of 52 cards, the  probability of drawing a queen when drawing a single card from a deck of 52 cards is 4/52.

Next you find the probability of drawing a king when drawing a single card from a deck of 51 cards(since you did not replace the first card you drew). Since there are 4 kings(the king of diamond, the king of hearts, the king of spades, and the king  of clubs) in a deck of cards, the  probability of drawing a king when drawing a single card from a deck of 51 cards is 4/51.

Then you multiply the two probabilities to determine the probability of drawing a queen then a king. So,

4/52 x 4/51 =

4 x 4/52 x 51 =

16/2652

Finally, simplify the fraction. The greatest number that can go into both the numerator and denominator is 4. So divide both the numerator and denominator by 4. When you do this, you get the following:

16 divided by 4 = 4 as the numerator and

2652 divided by 4 = 663 as denominator.

So, the final answer is 4/663.

4 0
3 years ago
What is 4•4•4•4•4 in exponential form? And need the answer ASAP
MariettaO [177]

Answer:

It is 4^{5}

Step-by-step explanation:

the four is multiplied 5 times

7 0
3 years ago
Read 2 more answers
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