Please help! Not even sure how to start with this one or how to calculate

Answers

Answer 1

Answer:
Remember when you learning about the "Least Common
Multiple" and you wondered when in the world you would
ever need to use it ?
Well, here you are ! Hello !

The next time they will cross the starting line together is the
LCM (Least Common Multiple) of 30 and 40 .

Do you remember how to find it ?
Here's one easy way:

Count by 30s until you come to a number that's divisible by 40 .

Laura's first lap. . . . . . . . 30 seconds . . . not divisible by 40
Laura's two laps . . . . . . . 60 seconds . . . not divisible by 40
Laura's three laps. . . . . . 90 seconds . . . not divisible by 40
Laura's four laps. . . . . . 120 seconds . . . divisible by 40

After 120 seconds, Laura has completed four laps,
Shelby has completed only three laps.

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Amanda exercised for 10 minutes every day in the first week, 20 minutes in the second week, 30 minutes in the third week, and 40 minutes in the fourth week.Billy exercised for 5 minutes every day in the first week, 10 minutes in the second week, 20 minutes in the third week, and 40 minutes in the fourth week.

Which statement best describes the methods used by Amanda and Billy to increase the time they spent exercising?

A) Amanda's method is linear because the number of minutes increased by an equal number every week.
B) Billy's method is linear because the number of minutes increased by an equal factor every week.
C) Both Billy's and Amanda's methods are exponential because the number of minutes increased by an equal factor every week.
D) Both Billy's and Amanda's methods are exponential because the number of minutes increased by an equal number every week.

Answers

Amanda Billy
1st week 10 5
2nd week 20 10
3rd week 30 20
4th week 40 40

A) Amanda's method is linear because the number of minutes increased by an equal number every week.
common difference is 10.
1st week 0 + 10 = 10
2nd week 10 + 10 = 20
3rd week 20 + 10 = 30
4th week 30 + 10 = 40

Billy's method is exponential:
5(2)^x

1st week 5(2⁰) = 5(1) = 5
2nd week 5(2¹) = 5(2) = 10
3rd week 5(2²) = 5(4) = 20
4th week 5(2³) = 5(8) = 40

Answer:

Step-by-step explanation:

She's got it ^^^

Please help me with my question!!

Answers

Answer:

Step-by-step explanation:

y = 10x + 50

x ---> no of weeks

y - intercept = 50

Y= 450 only becuase if not it will work

solve the equation in factoral form

(x+3)(x-2/5=0

Answers

$(x+3)(x-(2 )/(5))=0 \n \nx+3 =0 \ \ \vee \ \ x-(2)/(5)=0\n \nx = -3 \ \ \vee \ \ x=(2)/(5)$

Normal Distribution quiz?The total area under the curve is _________.

4

3

2

1

Answers

Area under ALL probability distribution curves is 1.0, because all possible outcomes are taken into account.

Final answer:

The total area under the curve of a Normal Distribution in Statistics is equal to 1, representing the entirety of the probability for all possible outcomes.

Explanation:

In the field of Statistics, when working with a Normal Distribution, the total area under the curve is equal to 1. This concept is crucially important as it represents the entirety of the probability for all possible outcomes, which in a Normal Distribution should amount to 100% or '1' when expressed as a decimal. The values on the x-axis represent the outcomes and the area under the curve for a given range represents the probability of outcomes in that range.

The curve of a Normal Distribution is symmetric, meaning half of the total area (0.5) is to the left of the mean and the other half (0.5) is to the right of the mean.

Learn more about Normal Distribution here:

brainly.com/question/30390016

#SPJ6

Solve by using the perfect squares method.x2 + 16x + 64= 0
a. –8
b. –16
c. 8
d. 16

Answers

x² + 16x + 64 = 0
x² + 2 * x * 8 + 8² = 0

Now, sing the formula (a + b)² = a² + 2ab + b² , we get,

(x + 8)² = 0

Square rooting on both sides, we get,

x + 8 = √0

x + 8 = 0

x = - 8 <== that's your answer!!!

x²+16x+64=(x+8)² (because (a+b)²=a²+2ab+b² => perfect square)
So you have to find x which will make (x+8)²=0
which is true when x+8=0
x=-8
That's a.
Hope it helps!

Solve the following simultaneous equations : 5m - 3n = 19; m - 6 = -7