MATHEMATICS HIGH SCHOOL

Pls answer urgent. 4 questions only, due today pls help answer

Answers

Answer 1

Answer:

Answer:

ANS: 1 - D

ANS: 2 - B

ANS: 3 - A

ANS: 4 - D

Step-by-step explanation:

Related Questions

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Which of these numbers are irrational? A) 4.3 B) -5/9 C) 1.618 D) _/6
Marco is 6 feet 3 inches tall. There are 2.54 centimeters in 1 inch. What is Marco's height in centimeters?
Which is bigger 25yd or 75ft
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Cory’s average score after 8 tests is 91%. If he gets a 78% on his 9th test what will his new average be?

Answers

8*91+78/9 would be an 89.55555 or just 89.56% if you have to round it would be 90%

What is the next number in the Fibonacci sequence: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ?

Answers

Each successive number is the sum of the 2 previous numbers, so the next number in the sequence would be

21 + 34 = 55

Answer:

1, 1, 2, 3, 5, 8, 13, 21, 34, 55

Step-by-step explanation:

the sum of Marys age and her moms age is 67. Three times Marys age increased by 7 is her moms age. How old is Mary and her mother

Answers

Sove the system:

x: Mary´s age
y: Mom´s age:

x + y = 67
3x + 7 = y

Replace y in the first equation:

x + 3x + 7 = 67
4x = 67 - 7
4x = 60
x = 15 yrs.

y = 67 - 15 = 52 yrs

Labels:
-- Mary's age = D (for 'daughter')
-- Mom's age = M (for 'mom')

The problem says 2 things:

   D + M = 67
and
   3D + 7 = M .

Let's subtract 'M' from each side of the first one: D = 67 - M

Now we can plug that into the second one, in place of 'D'.

   3D + 7 = M

   3(67 - M) + 7 = M .

Clear the parentheses on the left side. I assume you know how to do that.

   201 - 3M + 7 = M

Add 3m to each side:

   201 + 7 = 4M

   208 = 4M

Divide each side by 4 :

   52 = Mom's age

Daughter's age = 67 - Mom's age = 67 - 52 = 15

Joan’s father is 38 years old today. How many days old is he?

Answers

Answer: 13,879 days

If Joan's father is 38 years old today, that means that he was born in 1982. (2020-38=1982).

If we multiply 38 years by 365 days per year, we get 13,870 days.

But we need to take into account leap years, which happen every 4 years! In a leap year, there's an extra day in February. There have been 9 leap years since Joan's father was born.

So, we add 9 days to 13870 days, to get: 13,879 days.

Please give me Brainliest if this helped! :)

Final answer:

Joan's father, who is 38 years old, would be 13,870 days old. This is calculated by multiplying 38 years by 365 days/year.

Explanation:

To calculate how many days old Joan's father is, you simply need to multiply his age in years by the number of days in a year. Since we typically consider a year to have 365 days, the calculation is as follows: 38 years * 365 days/year. The answer, therefore, is 13,870 days. The main concept here is the conversion of units, in this case converting years to days. Remember to always consider the number of units in one when converting.

Learn more about Conversion of Units here:

brainly.com/question/37409096

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Use quadratic regression to find a function that fits the following points. (-2,-16), (3,11), (0,2).

Answers

Answer:

y = -1.2x² +6.6x +2

Step-by-step explanation:

The quadratic regression function of a calculator or spreadsheet can do this for you. The resulting function is ...

y = -1.2x² +6.6x +2

_____

If you want to do this by hand, put the given (x, y) values into the formula ...

ax² +bx +c = y

and solve the resulting system of equations.

The third point tells you c=2, so you can simplify the system of equations to ...

a(-2)² +b(-2) +2 = -16 ⇒ 4a -2b = -18 ⇒ 2a -b = -9

a(3)² +b(3) +2 = 11 ⇒ 9a +3b = 9 ⇒ 3a +b = 3

Adding these equations together gives ...

(2a -b) +(3a +b) = (-9) +(3)

5a = -6 . . . . . . . . simplify

a = -1.2 . . . . . . . divide by 5

b = 3 -3a = 3 -3(-1.2) = 6.6 . . . . from the second equation

Now we know the coefficients are a=-1.2, b=6.6, c=2, so the function is ...

y = -1.2x² +6.6x +2

Lisa leaves her house for a road trip and drives at a rate of 50 mph. Keisha leaves her house 1 hour later and drives along the same route at a rate of 60 mph. At any given time t, the distance traveled can be calculated using the formula d = rt, where d represents distance and r represents rate. Which system of equations can be used to find how long after Lisa departs her house she is passed by Keisha?A) d=50t
d=60t-1

B) d=50t
d=60(t-1)

C) d=50t
d=59t

D) d=50(t-1)
d=60t

Answers

B) d = 50t; d = 60(t - 1)
If the time t is in hours, and starts when Lisa leaves her house, then the total time she travels is t; while Keisha travels 1 hour less than the total time, (t - 1)