Four student's grades changed after the last test. Which student's grade changed the least? Student A: from 92% to 95% Student B: from 87% to 81% Student C: from 98% to 94% Student D: from 82% to 87%

Answer:

2

Step-by-step explanation:

To solve this equation I used the quadratic formula.

1. Place the units into the following formula. -b+-sqrtb^2-4ac

                                                                                  2a

2. After placing the units into the formula it should be -1+-sqrt1+24

                                                                                                   2

3. This should leave you with two possible answers -3 and 2 after solving it. The answer can not be negative of course cause there is no such thing as a negative time. So the answer has to be 2.

Answer:

Last one:

graph of increasing exponential function going through point 0, 4

Step-by-step explanation:

y = 4(1.5^x)

Is an exponential function with:

y-intercept: 4×1.5⁰ = 4×1 = 4

Horizontal asymptote: y = 0

Answer:

the last one

Step-by-step explanation:

Answer:3 m

Step-by-step explanation:

Given

Mia is 3 m behind Jane

Mia is left to the Christine

Distance between Mia and Christine is 5 m

Thus they form a right angles triangle shown in fig

So we can write

[tex]5^2=x^2+3^2[/tex]

Where x =distance between Mia and christine

[tex]x^2=25-16[/tex]

[tex]x^2=9[/tex]

[tex]x=3\ m[/tex]

Answer:

This means Sheila will need at least 9 containers (you need to round up to the next container).

Step-by-step explanation:

Answer:

Sheila will need at least 9 containers

hope it right

Answer: 18.85 units^3

Step-by-step explanation:

V = 3.14 x r^2 x h/3

Answer:

[tex]≈

18.849 {units}^{3} [/tex]

Step-by-step explanation:

[tex]v = \pi {r}^{2} \frac{h}{ 3} \\ = \pi \times {3}^{2} \times \frac{2}{3} \\ ≈

18.84956

[/tex]

hope this helps

brainliest appreciated

good luck! have a nice day!

Answer:

m = –3 and m = 3

Step-by-step explanation:

Answer:

x=10t+25

Step-by-step explanation:

The delivery fee is 25 dollars and each shirt is 10 dollars

Answer:

129 = QRX

Step-by-step explanation:

The exterior angle is equal to the sum of the opposite interior angles

49+80 = QRX

129 = QRX

Answer:

129°

Step-by-step explanation:

Exterior angle = sum of interior angles

Angle QRX = 49 + 80

= 129°

Answer:

3x^2 - 3x + 9

Step-by-step explanation:

you combine like terms. so the only things you can subtract is 7 - -2 which is actually 7 + 2. hope this helped

Answer:

(3x² + 7) – (3x - 2)= 3(x²-x+3)

Step-by-step explanation:

3x² + 7- 3x - 2   -add 7 and 2 to get 9

3x²- 3x+9         -factor the common term which is 3

3(x²-x+3)          -then here's you answer

Answer:

B

Step-by-step explanation:

inertia is the tendency to do nothing or remain unchanged

Answer:

yes

Step-by-step explanation:

Answer:

64 cm^2

Step-by-step explanation:

2*6 = 12/2 = 6

6 * 8 = 48

48+base= 48+16 aka. 4*4

64 cm squared

Answer:

....

Step-by-step explanation:

using pythagoras :

[tex] \sqrt{ {6}^{2} + {5}^{2} } = \sqrt{61} [/tex]

Answer:

C. [tex]\sqrt{61}[/tex]

Step-by-step explanation:

The answer is [tex]\sqrt{61}[/tex]

Answer:

a,b,c,d

Step-by-step explanation:

a,b,c,d

Answer:10.3

Step-by-step explanation:

Answer:

The correct answer is -2.

Step-by-step explanation:

it is -2 because if you replaced -2 with a you would have -2 minus 1.5 which is -0.5. -0.5 multiplied by 3 gets you -1.5.

Answer:

Step-by-step explanation:

3(a + 1.5) = -1.5

3a + 3*1.5 = -1.5

3a + 4.5 = -1.5

Subtract 4.5 from both sides

3a + 4.5 - 4.5 = -1.5 - 4.5

3a +0 = - 6.0

3a = - 6

Divide both sides by 3

3a/3 = -6/3

a = -2

Answer:

3

Step-by-step explanation:

3x-9=y

   +9. +9

3x=9y

divide three to both sides answer

Answer:

The correct option is (B) 250.

Step-by-step explanation:

A plant can manufacture 100 golf clubs per day for a total daily cost of $7,800.

And 120 golf clubs per day for a total daily cost of $8,400.

Let X = number of golf clubs manufactured per day.

Let Y = total cost of manufacturing golf clubs per day

It is provided that:

(x₁, y₁) = (100, 7800)

(x₂, y₂) = (120, 8400)

Form the least square regression line using two-point form as follows:

[tex](y-y_{1})=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}\ (x-x_{1})[/tex]

[tex](y-7800)=\frac{8400-7800}{120-100}\ (x-100)\\\\(y-7800)=30\times (x-100)\\\\y-7800=30x-3000\\\\y=30x+4800[/tex]

The least square regression line to estimate the total daily cost of x golf clubs  manufactured daily is:

y = 30 x + 4800

Compute the  number of golf clubs manufactured if the total daily cost is $12,300 as follows:

[tex]y = 30 x + 4800\\12300=30x+4800\\30x=7500\\x=250[/tex]

Thus, the correct option is (B).

Answer:

x = 10 is your answer

- Explain -

Step 1: subtract 1 from both sides (subtraction of equality)

which will give us:

2x = 21 - 1

which equals to

2x = 20

Step 2: Divide both sides by 2

which is

2x/2 = 20/2

2/2 = 1 and 20/2 = 10

Therefore the answer is x = 10

Step-by-step explanation:

It is a unique solution

5x-3y=6)*3

3x-2y=1)*5

15x-9y=18

15x-10y=5

-

________

y=13

x=9

Option D

Answer:

The first one is the better deal.

Step-by-step explanation:

The first one is the better deal =====

30% of 3 = 0.9

0.9 = 90

10% of 1 = 0.1

0.1 = 10

So the better deal would be 10% of 1

Answer:

So the plane drobe 1800 miles in 6 hours.

to find the time to plane was traveling per hour, we divide 1800 by 6 geting us with 300. THe plane traveled 300 miles per hour

Step-by-step explanation:

Answer:

300 mph

Step-by-step explanation:

[tex]Speed \: of \: plane \\ = \frac{distance}{time} \\ = \frac{1800}{6} \\ = 300 \: mph[/tex]

Thus plane was travelling at 300 miles per hour speed.

Answer:

the answer should be the second option idk for sure sorry if wrong.

Step-by-step explanation:

Answer:

The answer is the last one/ = 0.61

Step-by-step explanation:

Answer:

0.1, 1/2, 0 .7 , 3/4

Step-by-step explanation:

3/4, 0.7, 1/2 , 0.1

Change the numbers to the same form

3/4 = .75   1/2 = .5

.75 , .7  , .5   , .1

We want the numbers from least to greatest or smallest to biggest

.1 is the smallest

then .5

then .7

then .75

Changing the numbers back to the original form

0.1, 1/2, 0 .7 , 3/4

Answer:

0.1, 1/2, 0.7, 3/4

Step-by-step explanation:

3/4, 0.7, 1/2 , 0.1

Convert into decimals

0.75 , 0.7 , 0.5 , 0.1

0.1 , 0.5 , 0.7 , 0.75

Answer:

(C) 30πcm

Step-by-step explanation:

In order to find circumference you use the formula C (circumference)=2(pi)(r) in which r is the radius. In this case, two and 15 are thirty so to find the circumference all you have is the equation 30 times pi centimeters is equal to the Circumference.

Answer:

37 pi

Step-by-step explanation:

The circumference of a circle is equal to pi times the diameter.

The formula for the circumference of a circle is C=pi d,and since d = 37 ,we know that C=37 pi.

37 pi =116.238928183,but pi is irrational and the decimal will never end.

Thus,the most exact way to express the circumference is 37 pi.

Step-by-step explanation:

<ABD = arcsin 1/5 = 11.5 degree

so <DBC = 90 - 11.5 = 78.5 degree

BD = Square root (5^2 - 1^2) = 4.9

DC = 4.9 * tan 78.5 = 24 (rounded!)

AC = 1 + 24 =25

Answer:

4 inches is your answer! God bless!!

The radius of each semicircle in this composite figure is 1 in.

Area is the entire amount of space occupied by a flat (2-D) surface or an object's shape. The area of a plane figure is the area that its perimeter encloses. The quantity of unit squares whcihh cover a closed figure's surface is its area.

We have, Radius of semicircle = 2 in

So, Area of semicircle = πr²/2

                                    = 3.14/2 x 2/2 x 2 /2

                                    = 1.57 x 1 x 1

                                    = 1.57 mm²

So, the area of the semicircle is 1.57 mm².

Therefore, Radius = 1 in

Learn more about Area here:

brainly.com/question/12473099

#SPJ3

Answer:

I would say b

Step-by-step explanation:

If you are given 4% and inflation is 1% then you are making 3% More

Answer:

[tex]h(x) = \frac{1}{4}x[/tex]

Step-by-step explanation:

Suppose h is the inverse of f then

f(x) = y ⇔ h(y) = x

f(x) = y ⇔ 4x = y ⇔ x = y/4

and since x = h(y) then h(y) = y/4

then we can write :

[tex]h(x) = \frac{x}{4}[/tex]

______________________

:)