Does I-ready Diagnostic math detect cheating? Can teachers tell?

Answer:

200.06

Step-by-step explanation:

Area= πr2

Divide 16/2 to get radius

A= 3.14 x 8 x 8

A= 3.14 x 64

A= 200.06

Answer:

It is C.

III is saying that the two functions are inverse functions. If two functions, f(x) and g(x) are inverse, then f(g(x)) = x and g(f(x)) = x. Therefore, we see that if III is true, then I and II should also be true. Now, all we have to prove is that f(x) and g(x) are inverse functions. As we said before, if two functions are inverse, then f(g(x)) = x and g(f(x)) = x.

f(g(x)) = 3([tex]\sqrt[3]{\frac{x-2}{3} }[/tex])^3 + 2

f(g(x)) = 3[(x-2)/3]+2

f(g(x)) = x-2 + 2

f(g(x)) = x

Therefore, we have proved that f(g(x)) = x, and so f(x) and g(x) are inverse functions, and so all of I, II, and III are true. Thus, the answer is C.

fyi, we didn't have to do g(f(x)) because if f(g(x)) = x, then so will g(f(x)).

Answer:

52.5 sweets

Step-by-step explanation:

Given data

Total sweet= 120 sweet

She gave 1/4 of the sweets to her grandmother

=1/4*120

=30 sweets

Remaining sweet= 120-30= 90 sweets

She gave 5/12 of the remaining to her grandfather

=5/12*90

=450/12

=37.5 sweets

Balance of sweets

=90-37.5

=52.5 sweets

Answer:

4 = Y = 2x + 4

5 = Y = x - 4

6 = Y = 3 - x

7 = Y = -3/2x + 3 or -1.5x + 3

Step-by-step explanation:

So the starting value, or where x is 0, is the y intercept. You take that y value and just put the number there. The slope though is the growth in units by every x unit to the right. So we can measure with 1 unit how high the line goes, like for instance 4 you can see goes from -1 to 0 with y values of 2 to 4, which means the slope is 2. You've already done this, so I bet you know what you're doing. The y intercept of 4 is 4 because when y = 0, the point on the line is (0, 4)

Also very kind of you to put a fat 30 points man, very generous of you PogU

Answer:

I think it will be 54.125%

Answer:

13.04

Step-by-step explanation:

[tex]54\frac{1}{8}[/tex] %

0.54 + 12.5

13.04

Answer:

B.) 90

Step-by-step explanation:

Number line graph with closed circle on 90 and shading to the right. It shows that 90 should be greater or more. So its B.

I hope this helped! I also took the test and got it correct! :)

The Answer is B.

Its a Cubic function and this does not graph a line.

The first option

y=5 (A straight line)

for Y=-8x

Using Y=Mx + c

M is the slope

So it has a slope of -8.

Answer:

Uranus, Neptune, Saturn, Jupiter

Step-by-step explanation:

l

Answer:

[tex]y=\frac{5}{4}x-8[/tex]

Step-by-step explanation:

Hi there!

What we need to know:

1) Determine the slope (m)

[tex]5x - 4y = 36[/tex]

Rearrange the given equation into y-intercept form (this will help us determine m)

Subtract 5x from both sides

[tex]5x - 4y-5x = -5x+36\\-4y=-5x+36[/tex]

Divide both sides by -4

[tex]y=\frac{5}{4} x-9[/tex]

Now, we can see that [tex]\frac{5}{4}[/tex] is in the place of m, making it the slope. Because parallel lines have the same slopes, the slope of the line we're solving for is therefore [tex]\frac{5}{4}[/tex]. Plug this into [tex]y=mx+b[/tex]:

[tex]y=\frac{5}{4}x+b[/tex]

2) Determine the y-intercept (b)

[tex]y=\frac{5}{4}x+b[/tex]

Plug in the given point (8,2) and solve for b

[tex]2=10+b[/tex]

Subtract 10 from both sides

[tex]2-10=10+b-10\\-8=b[/tex]

Therefore, the y-intercept is -8. Plug this back into [tex]y=\frac{5}{4}x+b[/tex]:

[tex]y=\frac{5}{4}x-8[/tex]

I hope this helps!

Answer:

the height is 11 units the base is 12 units and the area is (i think) 84

Answer:

1. 4-2=2

2.2 10/21

Step-by-step explanation:

Answer:

100 dimes

Step-by-step explanation:

it's 100 dimes

Answer:

y intercept is (0,4)

Step-by-step explanation:

Answer:

80000

Step-by-step explanation:

Answer:

x=21

Step-by-step explanation:

A straight line is 180 so,

180-159=21

Answer:

no she dont

Step-by-step explanation:

she gotta have 125 cus theres 5 20's in 100 and theres only 4 5's in 20

Answer:

[tex]Mean = \$15[/tex]

[tex]Standard\ Deviation = \$53.85[/tex]

Step-by-step explanation:

Given

See attachment for probability distribution

Required

Determine the mean and the standard deviation

The mean of the distribution is:

[tex]Mean = E(x)[/tex]

and

[tex]E(x) = \sum x * P(x)[/tex]

So, we have:

[tex]Mean = \$500 * 0.01 + \$100 * 0.05 + \$25 * 0.20 + \$0 * 0.74[/tex]

[tex]Mean = \$5 + \$5 + \$5 + \$0[/tex]

[tex]Mean = \$15[/tex]

So:

[tex]E(x) = 15.00[/tex]

The standard deviation of the distribution is:

[tex]S = \sqrt{Var(x)}[/tex]

Where:

[tex]Var(x) = E(x^2) - (E(x))^2[/tex]

[tex]E(x^2) = \sum x^2 * P(x)[/tex]

So, we have:

[tex]E(x^2) = 500^2 * 0.01 + 100^2 * 0.05 + 25^2 * 0.20 +0^2 * 0.74[/tex]

[tex]E(x^2) = 2500 + 500 + 125 +0[/tex]

[tex]E(x^2) = 3125[/tex]

So:

[tex]Var(x) = E(x^2) - (E(x))^2[/tex]

Where

[tex]E(x^2) = 3125[/tex]

[tex]E(x) = 15.00[/tex]

[tex]Var(x) = 3125 - 15^2[/tex]

[tex]Var(x) = 3125 - 225[/tex]

[tex]Var(x) = 2900[/tex]

Recall that:

[tex]S =\sqrt{Var(x)[/tex]

[tex]S =\sqrt{2900[/tex]

[tex]S =53.85[/tex]

Answer:

x = 6°

Step-by-step explanation:

∠7 and ∠5 are equal because the two intersecting lines are parallel.

The equation is:

78° = 12x + 6°

Subtract 6 from both sides

72° = 12x

Divide by 12 on both sides

6° = x

x = 6°

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

Answer:

11 units

Step-by-step explanation:

Answer:

4 and 3/4 inches less for April

and 1 and  1/2 inches  less for March

Step-by-step explanation:

Answer:

The rate of descent is (1st picture's place)

Step-by-step explanation:

we know that

The formula to calculate the rate or slope between two points is equal to

Let

x------> the time in minutes

y----> the elevation in feet

we have

Substitute the values

*Note only the first picture worked*

Answer: 15

Step-by-step explanation:

Factors:

75: 1, 3, 5, 15, 25,

15: 1, 3, 5, 15

Write out all the factors of each number and circle the highest factor that both numbers have

Answer:

128

Step-by-step explanation:

In math, volume can be defined as the 3-dimensional space enclosed by a boundary or occupied by an object.

Answer:

256π cm³

Step-by-step explanation:

πr²·h=Volume

π·(4)²·16=π·16·16=256π cm³

Answer:

cake 90

Step-by-step explanation:

8×5×2=90

length ×width ×height

Answer:

quadratic

Step-by-step explanation:

Answer:

-.4685

Step-by-step explanation:

[tex]x^y=z\\y=log_zy\\10^{x+2}=34\\x+2=log_{10}34\\x+2=log34\\x+2=1.531478917\\x=-.468521083[/tex]