Mary wants to find this product. 58 x 20 How can Mary find the product? A. 0 +16 + 100 B. 0 + 160 + 1000 . C. 58 + 16 + 100 D. 58 + 16 + 1000​

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Explanation:

We start with one block at the very left side. This is algebraically written as [tex]a_1 = 1[/tex]. The small subscript '1' means we're dealing with the first term, and that is set equal to 1. In other words, the first term is 1.

The second term is three since we have three blocks as the next figure down the line. So [tex]a_2 = 3[/tex]. We can then see that [tex]a_3 = 6[/tex] and [tex]a_4 = 10[/tex]

The sequence of the first four terms are: 1, 3, 6, 10.

The notation [tex]a_n = a_{n-1} + n[/tex] tells us "to get the nth term [tex]a_n[/tex], we add the previous term ([tex]a_{n-1}[/tex]) to the value of n".

For example, if we wanted the third term, we would add the second term a2 onto the value of n = 2. In order to know a2, we need the diagram or you would have to use the recursive formula to find it.

Furthermore, it means that to find the fifth term [tex]a_5[/tex], we do the following

[tex]a_n = a_{n-1} + n\\\\a_5 = a_{5-1} + 5\\\\a_5 = a_{4} + 5\\\\a_5 = 10+5\\\\a_5 = 15[/tex]

The fifth figure will have 15 small little blocks to it. You can draw this out by copying the fourth figure, and then adding 5 smaller blocks to the very bottom portion. The sixth figure is basically a copy of the fifth one, but we have six little blocks along the bottom. This is the "plus n" being applied in the recursive formula.

So the 6th figure will have 15+6 = 21 blocks in total while the 7th figure has 21+7 = 28 blocks. This points us to choice (3).

Side note: These are known as triangular numbers. Note how the gaps between consecutive values of 1,3,6,10,15,21,28 is +2,+3,+4,+5,+6,+7.

Answer: 35

Step-by-step explanation:

We substitute a for 1 and b for 6.

5(1+6)=5(7)=35

Answer:

45min

Step-by-step explanation:

just mutiply

Answer:

83min

Step-by-step explanation:

can i have it im trying to get a new role

Answer:

Are you just giving away points because this isn't a question and someone will probably delete your answer.

Answer:

31/5

Step-by-step explanation:

[f(4) - f(-1)] / 4-(-1)

Answer:

15π or 47.12

Step-by-step explanation:

Given that :

θ = 3π/2

Radius, r = 10

Length of arc S :

Using the relation :

S = rθ ; r = central angle in radian

S = 10 * 3π/2

S = 30π/2

S = 15π or 47.12

Answer:

Step-by-step explanation:

CABD is half-circle as CD is diameter and cuts the circle in half

Correct choice is d)

Answer: 5

Step-by-step explanation:

.

Answer:

Volume=2616.67

Step-by-step explanation:

V=1/3pi r squared height

V=1/3(3.14)(10)squ.(25)

V=1/3(3.14)(100)(25)

V=2616.66667

V=2616.67

Answer:

Drivers who reside in longboat= Not a Representative Sample

Residents of long boat key= Population

Residents randomly chosen= Representative sample

Step-by-step explanation:

Answer:

Step-by-step explanation:

i don't know

Answer:

x=21 degrees

Step-by-step explanation:

Answer:

A polygon with 18 sides has 18 interior angles. Therefore, to find the measure of one of these angles, divide the sum by 18. Answer: Each angle is 160 degrees.

Step-by-step explanation:

7: Graph A

8: Graph B

9: Graph C

therefore: Graph A has infinitely MANY solutions; Graph B has ONE solution; Graph C has NO solution

also!! khan academy has a lesson that talks about this and is super helpful: https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:number-of-solutions-to-systems-of-equations/a/number-of-solutions-to-system-of-equations-review

funny they were already in order :) also could you please give me brainliest? all my brainliest answers disappeared :/

Answer:

45.53 inches

Step-by-step explanation:

c=pi*d d=14.5, 14.5*3.14 is 45.53 inches

Answer:

L

Step-by-step explanation:

thats tuff ez points jk its c

Answer:

The meal cost 80 dollars

Answer: well if you listened on school you wouldn't need help sooo

Step-by-step explanation: LISTEN IN SCHOOL

give me your gradma adress imma go there i have milk here

Lol

Answer:

70ml

Step-by-step explanation:

concentrate is half of water ( 140/2=70)

3 parts of 70ml   in total    (210ml )  

2 parts of water-----------70+70 of water= 140

1 part of concentrate 70 of concentrate

Answer:

snap tommyg324

Step-by-step explanation:

Answer:

Step-by-step explanation:

30÷6=5

Answer:

D. In(x - 3) + 4

Step-by-step explanation:

Answer:

parallelogram

Step-by-step explanation:

Looks like a rectangle, but then angles should be marked =90

But two sides are marked equal that makes it a parallelogram.

(a parallelogram is 4 sided figure where 2 opposite sides are =

Answer:

745.31

Step-by-step explanation:

1.  12.5^2 * 2 = 312.5

2. (3,14 * 156,25)/2 = 245.31

3.  (30 * 12.5)/2 = 187.5

4. 187.5 + 245.31 + 312.5 = 745.31

Answer:

[tex]745.45 mm^{2}[/tex]

Step-by-step explanation:

(semicircle) A1 = 245.45 mm

(rectangle) A2 = 312.5 mm

(triangle) A3 = 187.5 mm

Formula for semicircle = [tex]A = \frac{1}{2} \pi r^{2}[/tex]  

[tex]\frac{1}{2}\pi 12.5^{2} = 78.13\pi = 245.45 mm[/tex]

Formula for rectangle = [tex]A = lw[/tex]

[tex]25 x 12.5 = 312.5 mm[/tex]

Formula for triangle = [tex]A = \frac{1}{2} bh[/tex]

[tex]\frac{1}{2} 30(12.5) = 187.50mm[/tex]

Now we add them all up to get our answer

[tex]245.45 + 312.5 + 187.5 =745.45mm^{2}[/tex]

Answer:

16

Step-by-step explanation:

8 divided by 1/2 is 16 sites

Hope this helped!

Answer:

Billy

Step-by-step explanation:

1 divided by 5 is .20 or 20%

1 divided by 9 is .11 or 11%

Answer:

For red you have a 1/5% chance for pink you have a 2/4% chance also know as 50% chance

Step-by-step explanation:

Step-by-step explanation:

If we put 5 in X we get:

1. 3x-2 = 3(5)-2 = 15-2 = 13

2. x+8 = 5+8 = 13

So: 3x-2=x+8.

Answer:

-7-24x

Step-by-step explanation:

looked on photomath.