Find the sum and express it in simplest form. (3a^2 + 2a) + (5a^-a -7) ​

Answer:

14.9 dollars

Step-by-step explanation:

1. There are 30 students and if everyone pay the same, it will be 14.9 dollar. Because the total is 447 dolar and if everyone pay equally, then everyone have the same amount. So, 447 dollar divided to 30 student equal 14.9 per student.

2. The essential information is the total cost of money and the amount of student.

3. 30m = 447

/30      /30

m= 14.9 dollar

4. 14.9*30 = 447

Please like if I got it right.

Answer:

72 old houses

Step-by-step explanation:

Answer:

x = 5

Step-by-step explanation:

Given

4(x - 2) = 12 ( divide both sides by 4 )

x - 2 = 3 ( add 2 to both sides )

x = 5

Answer:

x= 128*

Step-by-step explanation:

180*-52*=128*

Answer:

x = 128

Step-by-step explanation:

well we know that for a polygon, the interior angles always add up to 360.

One angle is 52, and since the other two have squares it means that they are a perfect 90 degree angle. add those up to get 232, and then subtract 232 from 180 to get 128

Answer:7(3+5)= 21+35

Step-by-step explanation:

Answer:

The answer is ■■■■■■■■■■■□□□  NOWLOADING

Step-by-step explanation:

Hope this helps <3

Answer:

The answer is ■■■■■■■■■■■□□□ NOWLOADING

Step-by-step explanation:

Refresh a couple of times <33

Answer:

Domain: [tex][-1,\infty)[/tex]

Range: [tex](-\infty, 3][/tex]

Decreases over: [tex](-1,-\infty)[/tex]

Step-by-step explanation:

Given

[tex]f(x) = -\sqrt{x + 1} + 3[/tex] --- Missing from the question

Solving (a): The domain

To get the domain, the expression under the square root must not be negative.

In other words:

[tex]x + 1 \ge 0[/tex]

Solve for x

[tex]x + 1 -1\ge 0-1[/tex]

[tex]x \ge -1[/tex]

Hence, the domain is:

[tex][-1,\infty)[/tex]

To get the range, we plot the values of the domain in the expression.

[tex]x = -1[/tex]

[tex]f(x) = -\sqrt{x + 1} + 3[/tex]

[tex]f(-1) = -\sqrt{-1+1} +3[/tex]

[tex]f(-1) = -\sqrt{0} +3[/tex]

[tex]f(-1) = -0 +3[/tex]

[tex]f(-1) = 3[/tex]

[tex]x = \infty[/tex]

[tex]f(\infty) = -\sqrt{\infty +1}+3[/tex]

[tex]f(\infty) = -\sqrt{\infty}+3[/tex]

[tex]f(\infty) = -\infty+3[/tex]

[tex]f(\infty) = -\infty[/tex]

So, the range is: [tex](-\infty, 3][/tex]

To get the interval where the function increases or not, we simply plot the graph of f(x).

See attachment for graph.

From the attachment, it will be observed that the graph of f(x) continuously decreases from x = -1, and it never increased.

This implies that, the graph decreases over the interval [tex](-1,-\infty)[/tex]

Answer:

a) 24 degrees

b) 50 degrees

Step-by-step explanation:

part a : use sine-1

sine-1 = [tex]\frac{opposite}{hypotenuse}[/tex]

sine-1 = [tex]\frac{17}{42}[/tex]

sine-1 = 0.405

missing angle = 23.89

round to the nearest degree = 23.89 = 24

part b : use cosine-1

cos-1 = [tex]\frac{adjacent}{hypotenuse}[/tex]

cos-1 = [tex]\frac{16}{25}[/tex]

cos-1 = 0.64

missing angle = 50.208

round to the nearest degree = 50.208 = 50

Answer:

when x=4

the value of x(14 - x)=4(14-4)=4×10=40

Answer: AB = 150 degrees

Step-by-step explanation: 90 + 60 = 150

Answer: 50%

Step-by-step explanation:

If we can get a head tails combo in any order we could get a head/tails or a tails/head so there is a 50% probability of getting that combo in a trial

Answer:

43

Step-by-step explanation:

180 - (109+28) = 43

the sum of all angles in a triangle is 180

Answer:

There were 206 more people on Thursday than on Monday.

Step-by-step explanation:

520 - 314 = 206

Answer:

h= 6 in

Step-by-step explanation:

A= bh

A= 108

b= 18

108= 18h

108/18=6

Answer:

This is your answer ☺️

Answer:

y=9x

Step-by-step explanation:

First let's find the slope of this.

To find the slop we can take two points.

(1,9) & (3,27)

27-9/ 3-1 (slope equation) = 18/2=9

The slope of the equation is 9.

Now let's use point-slope form to find the equation.

(1,9)

y-9=m(x-1) (substitute the x2 and y2 values for the coordinate values)

y-9=9(x-1) (substitute m for the slope)

y=9x-9+9

y=9x

Answer:

B

Step-by-step explanation:

(5^2) ^4 • 5^5 = 1220703125

5^13 = 1220703125

Answer:

x = 25

Step-by-step explanation:

2x + 70 = 120      {Subtract 70 from both sides}

        2x = 120 -70

        2x = 50      {divide both sides by 2}

          x = 50/2

x = 25

Answer:

19.8 minutes

Step-by-step explanation:

Total time the 4 laps was completed = 4 x 2.5 = 10 minutes

Total time the 2 laps was completed = 2 x 4.9 = 9.8 minutes

total time = 10 minutes + 9.8 minutes = 19.8 minutes

Answer:

C = 101

E = 46

Step-by-step explanation:

79 + 134 = 213

180 - 79 = 101 (C+F has to equal 180)

79 + 134 + 101 = 314

360 - 314 = 49 (trapezoids have a total degree of 360)

The measure of angles are ∠C = 101°, ∠E = 46°, ∠J = 83°, ∠L =97°, and ∠M = 97°.

It is given in the picture that measures the angles of a trapezoid.

It is required to find the other angles.

It is defined as the quadrilateral having four sides in which two sides are parallel to each other it is a 2-dimensional geometry.

We have a trapezoid CDEF in which ∠D = 134° and ∠CFE = 79°

We know in trapezoid:

∠C+∠F = 180° and

∠D+∠E = 180°

For ∠C = 180° - ∠F ⇒ 180° - 79° ⇒ 101°

For ∠E = 180° - ∠E  ⇒ 180° - 134° ⇒46°

We have another trapezoid JKLM in which ∠K = 83°

We know in isosceles trpezoid:

∠K = ∠J = 83° and

∠L = ∠M

∠L = 180° - ∠K ⇒ 180° - 83°  ⇒ 97° ⇒ ∠M

Thus, the measure of angles are ∠C = 101°, ∠E = 46°, ∠J = 83°, ∠L =97°, and ∠M = 97°.

Learn more about the trapezoid here:

https://brainly.com/question/8643562

Answer:

Out of curiosity, what is making this problem difficult?

Step-by-step explanation:

initially there are 20 rabbits,  so the '?' is asking for that

Answer:

1) 12m

2)15.2ft

3) 22km

4) 10ft

5) 4.4in

6) 12km

7) 10cm

8) 2cm

9) 56.55cm

10) 43.98ft

11) 71.63km

12) 23.88cm

13) 138.23yards

14) 100.53ft

15) 50.27yd²

16) 95.03in²

17) 52.81ft²

18) 153.94mi²

19) 162.86mi²

20)452.39ft²

Step-by-step explanation:

Step-by-step explanation:

To find the diameter of a circle, you multiply the radius (the radius is the distance from the outside of the circle to the middle) by 2.

Ex: the first one has 6m as the radius. So you would multiply the 6 by 2. Which would be 12.

The radius is half of the diameter. So for number 8, the answer would be 2.

hope this helps and that it wasn't to confusing  :)

Answer:

y = 4

Step-by-step explanation:

First isolate y

-4 + 3y = 8

3y = 8 + 4

3y = 12

y = 4

Answer:

Y=4

Step-by-step explanation:

3y=12

y=4

Answer:

180 total beads used

Step-by-step explanation:

=) have a good day

Answer:

This is known as null effect

Step-by-step explanation:

A null effect is the outcome of an experiment that does not give the effect or result expected. Although an experiment with a null effect has a result, however the result of the experiment does not support the hypothesis

An example of a null result that remains importantly useful is the Michelson-Morley experiment from that partly made possible the formulation of special relativity theory

Answer:

Yes links are not good

Step-by-step explanation:

Answer:

(A)1/3

Step-by-step explanation:

probability of getting a 2 = 1/6

probability of getting a 6 = 1/6

so the probability of getting a 2 or a 6

=(probability of getting a 2+probability of getting a 6)

=(1/6+1/6)

=2*(1/6)

=1/3