Please help I don’t understand

Answer:2.5%

Step-by-step explanation:

2.5% of the school has sibloings

55+45=100

100÷40=2.5

Answer:

C. Magma pushed up from the mantle to sedimentary rocks which

then eroded leaving the column.

Step-by-step explanation:

Geologists Carpenter and Russell studied Devils Tower in the late 1800s and concluded that the Tower was formed by an igneous intrusion (the forcible entry of magma through other rock layers).

Answer: x^2 + 6x + 9

Step-by-step explanation:

first, you square everything.

x^2 + 2x x 3 + 3^2

then, you calculate/evaluate.

x^2 + 6x + 9

Answer:

8.246 units long

2sqrt(17) units long in simplest radical form

Step-by-step explanation:

Use the Pythagorean Theorem to find the missing leg length:

a^2+b^2=c^2

4^2+b^2=sqrt(84)^2

16+b^2=84

b^2=68

b=sqrt(68)

b=2sqrt(17) <-- Simplest Radical Form

b=8.246

So the third side is approximately 8.246 units long

The volume of the right circular cylinder is changing at a rate of approximately 50.265 cubic inches per second.

Given that a right circular cylinder is changing shape.

The radius is decreasing at the rate of 2 inches/sec

dr/dt = -2 inches

The radius is increasing at the rate of 2 inches/sec

dh/dt=5 inches

We have to find dv/dt when r is 4 inches and h is 6 inches.

Volume=πr²h

Differentiate with respect to 't' to find the change of volume:

[tex]\frac{dV}{dt}=\pi(2rh\frac{dr}{dt}+r^2\frac{dh}{dt})[/tex]

Plug in the values:

[tex]\frac{dV}{dt}=3.14(2(4)(-2)(6) + 16(5))[/tex]

[tex]=3.14(-96+80)[/tex]

[tex]=3.14(-16)[/tex]

[tex]=-50.265[/tex] inch³/sec.

Hence, the volume change is -50.265 inch³/sec.

To learn more on Three dimensional figure click:

https://brainly.com/question/2400003

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Step-by-step explanation:

2x - 3y = 9

2x + 3y = 3

__________ -

-6y = 6

y = -1

2x - 3y = 9

2x - 3(-1) = 9

2x - (-3) = 9

2x = 12

x = 6

Answer:

The answer is z= 7.5

Step-by-step explanation:

Answer:

Step-by-step explanation:

56

Answer:

14 3/8 pounds

Step-by-step explanation:

Given

Total pounds donated = 50 pounds

Amount for dogs D = 17 3/4 pounds

Amount for puppy P = 17  7/8 pounds

Required

Amount of cat food C

Total = D + P + C

50 = 17 3/4 + 17 7/8 + C

50 = 71/4 + 143/8 + C

50 = (142+143)/8 + C

50 = 285/8 + C

C = 50 - 285/8

C = 400-285/8

C = 115/8

C = 14 3/8

Hence the pounds of cat food donated was 14 3/8 pounds

Answer:

a

Step-by-step explanation:

The force that moves food through the esophagus into the stomach is;

d:Push force from contractions of the esophagus moves food through the esophagus.

When we are sitting upright and eat food, the food moves down the esophagus and into the stomach.

Now, that will be a logical explanation because just like a flow, it goes with gravity position and would go from up down like a free fall.

However, when we are not sitting upright but upside down with our head on the ground and legs up, what happens is that the food still goes to the stomach via the oesophagus but this time because of the position of the body, the oesophagus will contract i.e. contraction in the walls of the food pipe which will lead to a push force that takes the food into the stomach.

Read more about digestive process at; https://brainly.com/question/1285073

Answer:

your answer simplified is:

13+3i

Answer:

97o im pretty sure

Step-by-step explanation:

Answer:

Your answer should be C

Step-by-step explanation:

63+44=107

Answer:

True

Step-by-step explanation:

Answer:

150$

Step-by-step explanation:

Answer: 150

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threhwrthwrhwryjwyt

Answer: D) x - 0.2x

Step-by-step explanation:

The hat has a regular price of x dollars.

This price is reduced by 20% so the relevant expression for the discount is; 20% * x or; 0.2x

The discounted price will be the price of the hat less the discount which means the formula will be;

= Price - discount

= x - 0.2x

Answer:

1,760 actual miles separate Springfield from Glenview.

Step-by-step explanation:

Scaling

Objects can be represented in a reduced or augmented size by using scaling which is basically multiplying or dividing real dimensions by a constant factor. We use scaling when representing geographic locations on a map.

The map has the scale:

0.75 inch => 220 miles

This gives us the scaling factor as 220/0.75. There is no need to divide.

We are given the distance from Springfield to Glenview is 6 inches on the map. The actual distance is

6*220/0.75 = 1,760

1,760 actual miles separate Springfield from Glenview.

Answer:

74

Step-by-step explanation:

because it is alternate angle

Answer:

1. 106º

2. 146º

Step-by-step explanation:

1. The two angle are supplementary which means that together they will equal 180º

2. The acute angle next to the angle in question is completing the 180º of both the triangle and the line meaning that the 90º of the triangle plus 56º of the other angle must be the same amount of degrees as angle x.

Answer: The answer is: -2

Step-by-step explanation:

Here, suppose

(5,-2)=(x1, y1)

(-7,22)=(x2, y2)

Now, use the slope equation to find slope(m).

     y2-y1=m(x2-x1)

or,m=y2-y1/x2-x1

After this, just substitute the values from above.

9514 1404 393

Answer:

  ? = 95°

Step-by-step explanation:

Long arc QR is twice the measure of inscribed angle QSR, so is 2×95° = 190°. That, together with the remaining short arcs ? and RS will make up the total circle of 360°.

  arc QR + arc RS + ? = 360°

  190° +75° +? = 360°

  ? = 360° -265° . . . . . . subtract 265° from both sides

  ? = 95°

Answer:

(-10,-7)

Step-by-step explanation:

Lets start with the equation y>-3x+7

Which of these are solutions?

(5,-5) - yes

(10,-8) - yes

(5,-6) - yes

(-10,-7) - no

Now lets do the equation y<4/5x-2

Which of these are solutions?

(5,-5) - yes

(10,-8) - yes

(5,-6) - yes

(-10,-7) - no

So, the point (-10,-7) is not a solution to the system of equations.

Answer:

Option A

Step-by-step explanation:

If you divide a negative number by a negative number, the answer will always be positive, so A must be the right answer  

Answer:

$2,185

Step-by-step explanation:

Multiply the amount spent by the tax rate.

23,000 x 9.5% = $2,185

Answer:

20 %

Step-by-step explanation:

tell me if I'm wrong , your welcome and merry Christmas !!

Answer: 20%

Step-by-step explanation: 50 times 5 is 250. If you take 5 out of 100 you get 20’s

Answer:

C.

Step-by-step explanation:

When you fix in the values of x from the table, you'll get y

Please gimme brainliest

Answer:

C

Step-by-step explanation:

Substitute the values of x and y in the this equation , the equation will be satisfied

Y=2x+3 (x=0,y=3)

3= 2(0)+3

3=3

Answer:

$54080

Step-by-step explanation:

Step one:

given

principal= Rs. 50000

rate= 4%= 0.04

time= 2 years

Required

The final Amount A

Step two

Applying

A= P(1+r)^t

substitute

A= 50000(1+0.04)^t

A= 50000(1.04)^2

A= 50000*1.0816

A= 54080

$54080

Answer:

The final cost for the service that offers the better deal is $56 per month, in total for the whole year it's $672.

The cost for the one that offers the worse deal is $65 per month.

Step-by-step explanation:

All we need to do is multiply the amount of money by the number of employees.

So:

20 × $2.80 = $56

(Calculations for worse deal)

20 × $3.25 = $65

Answer: $108.00

Step-by-step explanation:

$3.25 per employee, per month (3.25 x 20 x 12) = $780/ mo

$2.80 per employee, per month (2.80 x 20 x 12) = $672/mo

subtract the two, which equals $108.00 will be saved each year with the one-year subscription.

Answer:

Step-by-step explanation:

slope(m)= -Coefficient of x / Coefficient of y

                 = -3/-1

                  = 3

Hence the slope of line in 3.  

Answer:

35% of the cupcakes were Mocha.

Step-by-step explanation:

So, 28 + 52 = 80 which means the question is: 28 is what percent % of 80? And 28 is 35% of 80. Hope I helped! Sorry if not. Have a wonderful day and an even better Christmas break! Remwmber to focus on the positive and give me a follow! ;) Bye!