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forsale [732]
3 years ago
15

Seven times the sum of 5 and a number amount to 91. Find the number

Mathematics
2 answers:
vova2212 [387]3 years ago
7 0

Answer:

n=8

Step-by-step explanation:


Marta_Voda [28]3 years ago
3 0

Answer:

Replace  with  

91

and simplify.

5

,

91



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What is the average of 137 and 105
nata0808 [166]

Answer:

121

Step-by-step explanation:

to find the average, you are going to add them together and divide by two, because you have two numbers. so 137 + 105 = 242. then divide. 242/2 = 121 that is your answer.

3 0
3 years ago
Peggy had three times as many quarters and nickels. she had $1.60 in all. How many nickels and how many quarters did she have?
makvit [3.9K]
If she has 3 times as many quarters as nickels, and nickels are represented by n, you would multiply n by three to get your answer, so your answer is 3n, or D.
3 0
3 years ago
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Fiona wants 6 red, 3 green and 3 yellow buttons on her dress. All buttons must be placed along a straight vertical line with no
elixir [45]

The appropriate method to use in solving the given question is permutation. Then, the numbers of ways to arrange the buttons is 1320 ways.

In the given question, the order of arrangement is important, so that the number of ways that Fiona could order the buttons can be determined by permutation method.

i.e _{n}P_{r} = \frac{n!}{(n - r)!}

Red      6

Green   3

Yellow  3

Total     12

Since no two neighbouring buttons of the same colour is allowed, then 3 buttons would be arranged at a time.

Thus, n = 12 and r = 3;

_{12}P_{3} = \frac{12!}{(12 - 3)!}

      = \frac{12!}{9!}

      = \frac{12*11*10*9!}{9!}

      = 12 x 11 x 10

_{12}P_{3} = 1320

Therefore the buttons can be arranged in 1320 ways without two neighbors having the same colour.

Visit: brainly.com/question/1408616

3 0
3 years ago
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How can help me with this operation about Pre-Calculus.<br>Simplify
Mrrafil [7]

If we want to compute f(2+h), we have to substitute every occurrence of x with 2+h in the definition of the function:

f(x)=x^2-11x \implies f(2+h) = (2+h)^2-11(2+h) = 4+4h+h^2-22-11h = h^2-7h-18

Similarly, computing f(2) means to substitute the input with 2:

f(x)=x^2-11x \implies f(2) = 2^2-11\cdot 2 = 4-22 = -18

So, we have

f(2+h) - f(2) = h^2-7h-18 - (-18) = h^2-7h

And finally

\dfrac{f(2+h)-f(2)}{h} = \dfrac{h^2-7h}{h} = h-7

5 0
3 years ago
If a certian perosn has a mass of 250kg on earth, would that person's mass be on the moon, if the moon's gravity is 1.62m/s2? *
IceJOKER [234]

Answer:

Weight On the Moon: 41.34 kilograms

Step-by-step explanation:

6 0
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