MATHEMATICS HIGH SCHOOL

Please help me, appreciated if you do :)

Answers

Answer 1

Answer:

Answer:

6x-8=2x+4

6x-2x=8+4

4x=12

x=3

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1. Which events are dependent? I. flipping a coin multiple times II. picking even numbers,with replacement. III. picking odd numbers,without replacement. A. I only B. III only C. I and II D. II and III. 2.Which events are independent? I. flipping a coin multiple times II. picking coins, with replacement III. picking coins ,without replacement. A. I only B. II only C. I and II D. II and III and last one A spinner numbered 1 through 8 is spun 3 times. what is the probability of spinning an even number, then an odd number, and then an 8? Write your answer as a decimal. do not round. Please help me

A fish tank at a pet store has 8 zebra fish. in how many different ways can Nikki choose 3 zebra fish? A.512 B. 336 C. 24 D. 56 I got 24 is it right?

Answers

56 is the answer because
8*7*6/3*2

Clare made $160 babysitting last summer. She put the money in a savings account that pays 3% interest per year. If Clare doesn't touch the money in her account, she can find the amount she'll have the next year by multiplying her current amount by 1.03. How much will she have in 30 years

Answers

Answer:

$388.36

Step-by-step explanation:

let us assume that the amount in her accounts compounds annually

Given data

principal p= $160

interest rate r= 3%= 0.03

time t= 30 years

At the end of 30 years the money she will will have can be expressed as

A= P(1+r)^t

A= 160(1+0.03)^30

A= 160(1.03)^30

A= 160*2.42726

A= $388.36

in 30 years she will have $388.36

Rewrite the expression by using grouping symbols. y • 4 + y • z A.4(y + z) B.y • (4 + y) • z C.z(y • 4) D.y (4 + z)

Answers

$y\cdot4+y\cdot z=y\cdot(4+z)\ \ \ \Rightarrow\ \ \ Ans.\ D$

A straight line has gradient m and passes through the points (0,-2). Find the two values for m for which the line is tangent to the curve y=x^2-2x 7. And for each value of m, find the coordinates of the points where the line touches the curve

Answers

Answer:

when m=2 or -2, the line is tangent to the curve at the points (2.7) and (0,7)

Step-by-step explanation:

Answer:

Hi,

Step-by-step explanation:

The curve is y=x^²-2x+7

The tangent has for equation: y=mx-2

Let's find the intersection of the tangent and the curve.

$mx-2=x^2-2x+7\n\nx^2+(-2-m)x+9=0\n\Delta=(-2-m)^2-4*9=m^2+4m-32\nThe\ point\ must\ be \ unique: \Delta=0\n\nm^2+4m-32=0\n\delta=4^2+4*32=144=12^2\n\nm=(-4-12)/(2) =-8\ or\ m=(-4+12)/(2) =4\n\nx^2+(-2-m)x+9=0\ and\ \Delta=0 = > x=(2+m)/(2) \n\nif\ m=-8\ then\ x=(2+(-8))/(2)=-3\ and\ y=mx-2=(-8)*(-3)-2=22\n\nif\ m=4\ then\ x=(2+4)/(2)=3\ and\ y=mx-2=4*3-2=10\n\n\nCoordinates\ of\ the\ points\ are (-3,22)\ and\ (3,10)\n$

Drag the tiles to the correct boxes to complete the pairs.

Answers

Graph 3
Graph 1
Graph 4
Graph 2

How many seconds in an hour

Answers

There are 60 minutes in an hour, and there are 60 seconds in a minute, so to find out how many seconds there are in an hour, all we have to do is multiply the amount of seconds in a minute by the amount of minutes in an hour.

60 * 60 = 3600

There are 3,600 seconds in one hour.
Hope that helped! =)

3,600 is the seconds in a hour 60*60

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