Solve for x
a 2.2
b 5.4
c 6.5
d 7.2

Answer:

  (c)  9.5 hours

Step-by-step explanation:

The equation of the trend line predicts a score based on study hours. Here, we're asked for the inverse relation: finding a number of study hours based on a given score.

We can solve the equation for x in terms of y:

  y = 3.1x +40.5

  y -40.5 = 3.1x . . . . subtract 40.5

  (y -40.5)/3.1 = x . . . . divide by the coefficient of x

This tells us the number of hours spent studying for a particular score.

Using y=70, we find the number of study hours to be ...

  x = (70 -40.5)/3.1 = 29.5/3.1 ≈ 9.516 ≈ 9.5

The student spent about 9.5 hours studying.

Answer:

The area of the shaded region is 42.46 cm2

Step-by-step explanation:

Answer:

5 x 5 = 25

25 x 3.14 = 78.5

11 x11 = 121 - 78.5 = 42.5

42.5 cm

Step-by-step explanation:

22

pretty sure we are doing the same test

Answer:

  10. Expanded vertically by 3, shifted left 2 and up 4.

  11. Shifted right 6 and up 7.

Step-by-step explanation:

This sort of question involves matching patterns. You need to know what the various transformations look like, and what that means for a specific parent function.

Here are the transformations used in this problem:

For these problems, the parent function is f(x) = 1/x.

__

10. The multiplier of 3 in the numerator (3/x) means the function has been scaled vertically (expanded) by a factor of 3.

The replacement of x with x+2 means the function has been shifted to the right by -2 units. That is the same as shifted left 2 units.

The addition of 4 to the function value means the function has been shifted up by 4 units.

__

11. We note the numerator is still 1, so there is no vertical expansion. The replacement of x with x-6 means a right shift by 6 units. The addition of 7 to the function value means a shift up by 7 units.

Answer:

x=1.11651513…,−0.71651513…

Step-by-step explanation:

Answer:

-2

Step-by-step explanation:

A.P.E.X.

Answer:

Volume of block Jennifer bought:

V = side^3 = 12 x 12 x 12 = 1728 (in3)

Volume of sphere Jennifer wanted to make:

V = (4/3) x pi x radius^3 = (4/3) x pi x (4/2)^3 = 33.5 (in3)

a, The number of spheres she can make:

N = 1728/33.5 = 51.58 = ~51

b, The area of remaining clay after she made a sphere:

A = 1728 - 33.5 = 1694.5 (in3)

Hope this helps!

:)

Answer:

9/25 units^2

Step-by-step explanation:

AREA(Square) = side * side = 3/5 *3/5 = 9/25 square units

Answer: 9/25 units ^2 :)

Answer:

2^2

Step-by-step explanation:

2^2-3=1

Hope this helps!

Answer:

it is 2^2

Step-by-step explanation:

i did the iready diagnostic

Answer:

Each side is (7/2d +4) cm

Step-by-step explanation:

The perimeter of a square is given by

P = 4s  where s is the side length

14d +28 = 4s

Divide each side by 4

14d/4 +28/4 = 4s/4

7/2d +7 = s

Each side is (7/2d +4) cm

Answer:

1 x 106 = 106

2 x 53 = 106

53 x 2 = 106

106 x 1 = 106

Step-by-step explanation:

(happy to help)

Answer:

1 x 106 = 106

2 x 53 = 106

53 x 2 = 106

106 x 1 = 106

 Give me Brainliest Plz

Answer:

2:00 p.m.

Step-by-step explanation:

driving to the museum is 12:30

then they sped 1 hour and 30 minutes

Answer:

The theoretical probability is greater than the experimental probability.

The best comparison between the theoretical and experimental probability of tossing heads: The theoretical probability is equal to the experimental probability.

The theoretical probability of tossing heads can be calculated as the ratio of the number of favorable outcomes (heads) to the total number of possible outcomes (heads or tails). In a fair coin, this probability is 0.5 or 50%.

The experimental probability is determined by the outcomes observed in the experiment. In this case, Bailey observed 7 heads out of 10 tosses, which gives an experimental probability of 7/10 =0.7 or 70%.

Comparing the theoretical probability (0.5 or 50%) with the experimental probability (0.7 or 70%), we find that they are not exactly the same but quite close.

Given that the experimental probability is based on a limited number of trials (10 tosses), it may not perfectly match the theoretical probability. However, with more trials, the experimental probability tends to approach the theoretical probability.

Hence, the best comparison between the theoretical and experimental probability of tossing heads is that they are approximately equal.

Answer:

i think C

Step-by-step explanation:

Answer:

It's D sin(a)

Step-by-step explanation:

Answer:

-26

Step-by-step explanation:

If the temperature dropped by 14 degrees than it decreased by 14, which means we subtract:

-12-14= -26

Answer:

Lin should expect to sell 10 cups more

Step-by-step explanation:

The line c = 2t − 89 relates the cups Lin expect to sale (c) with the high temperature of the day (t)

If high temperature on Saturday is t1, then high temperature on Sunday is (t1+5)

Cups sold on Saturday are: 2t1 − 89

Cups sold on Sunday are:  2(t1+5) − 89 = 2t1 + 10 - 89

Cups sold on Sunday - Cups sold on Saturday:

2t1 + 10 - 89 - (2t1 − 89) = 2t1 + 10 - 89 - 2t1 + 89 = 10

Answer:

46 minutes

Step-by-step explanation:

Answer:

A) x=8

Step-by-step explanation:

it can not be B because -8^2 = -64. it can't be either C or D because 64^2 = 4096 and doesn't equal 64.

Answer:

A

Step-by-step explanation:

The radius of the circle is 10.5.

Pythagorean theorem states that for a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

We can apply this theorem only in a right triangle.

Example:

The hypotenuse side of a triangle with the two sides as 4 cm and 3 cm.

Hypotenuse side = √(4² + 3²) = √(16 + 9) = √25 = 5 cm

We have,

AC = 20 and BC = 17

From the figure,

We apply the Pythagorean theorem.

So,

AC² = BC² + AB²

Substituting,

20² = 17² + AB²

AB² = 400 - 289

AB² = 111

Now,

Radius = AB

So,

AB = √111

AB = 10.535

Rounding to the nearest tenth.

AB = 10.5

Thus,

The radius of the circle is 10.5.

Learn more about the Pythagorean theorem here:

https://brainly.com/question/14930619

#SPJ3

Answer:1d

Step-by-step explanation:

Step-by-step explanation:

Bringing like terms on one side

8d - 7d = 6

d = 6

Answer:

y = 0.50 + 8

Step-by-step explanation:

The slope is .50 and the y-intercept is 8

y-int is the initial cost before adding toppings.

slope represents the cost of each topping.

Answer:

49 baseball cards.

Step-by-step explanation:

First you want to add 5 cards to the 55 for the 5 he traded for the one. You get 60. Then subtract the 11 cards that he was given for the 1. You end up with 49 baseball cards.

The probability of picking a 7 and then picking a number greater than 7 is 1/6.

Probability is the likelihood of the occurrence of an event.

Sample space = {6 or 7 or 8 or 9}

So, favorable outcomes =1( we need 7)

Total outcomes =  {6, 7, 8, 9} i.e. 4

So, the probability of picking a 7 in the first pick = 1/4

After the first pick, Sample space =  {6 or 8 or 9}

So, favorable outcomes =2( we need 8>7 or 9>7)

Total outcomes =  {6, 8, 9} i.e. 3

So, the probability of picking an 8 or 9 in the second pick = 2/3

Total probability = 1/4 * 2/3

Total probability = 1/6

Hence, the probability of picking a 7 and then picking a number greater than 7 is 1/6.

To get more about probability visit:

https://brainly.com/question/24756209

Answer:

<1 = 95

<2 =85

Step-by-step explanation:

<1 = 95

They are alternate exterior angles and alternate exterior angles are equal when the lines are parallel

<1 + <2 = 180  since they form a straight line

95+ <2 =190

Subtract 95 from each side

95-95+<2 =180-95

<2 =85

Answer:

do 3 dived by 2 they the awnser times seven then add 105 then multiply 60 then carry the 3 then add 10 and 6 then add 16 to the awnser and boom!

Step-by-step explanation:

1.2 cm + ( 9 × 1.7 cm ) = 16.5 cm

30 cm - ( 9 × 1.5 cm ) = 16.5 cm

So the answer is 9 seconds!

Hope this helps :)

Let me know if my answer is incorrect or something :0

Answer:

Total area= 207 ft^2

Step-by-step explanation:

You can divide the figure to make 2 big rectangles.

The first has a base of 15 ft and a height of 15 ft

A1 = b * h

A1= 15 ft * 9 ft        A1= 135 ft^2

The second has a base of 12 ft and a height of 6 ft

A2= b*h

A2= 12 ft * 6 ft

A2= 72 ft^2

Total area= A1+A2= 135 ft^2 + 72 ft^2  

Total area= 207 ft^2

Answer:

the answer is C

Step-by-step explanation:

Answer: (C) the linear

Step-by-step explanation:

at x = 3 the y-value ... is growing

Answer:

Step-by-step explanation:

The rate of growth (the slope of the transformed curve) is first higher than for an exponential function, but later it goes down. ... Initially, the quadratic function grows much faster. The function x² grows from 0 to 1 in finite time, while the exponential function takes from minus infinity to 0.

Answer:

(1, -4)

Step-by-step explanation:

y = 3x-7

Let x = 1

y = 3(1) -7

y = 3-7

y = -4