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shepuryov [24]
3 years ago
8

Please help me on #20 and #21 and I will help you back;)

Mathematics
1 answer:
nevsk [136]3 years ago
5 0
3x9 = 27
2x4 = 8
4x3 = 12

27+8 = 35
35+12 = 47
47-10 = 37

You have 37$ left to pay. You get your answer by multiplying the amount of dinners or meals by the money, and add them all together and subtract the 10$ coupon.
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How do you solve both of these problems? Please helpp
Lana71 [14]
The answer to the first one is 15.6 and the second one is 1.76

3 0
3 years ago
If you cut a 35 inch long stick in two pieces in the ratio 2:3, how long would each part be?
Aliun [14]

Answer:

14 : 21

Step-by-step explanation:

---> 2:3 ----> 2+3=5

---> Stick's length = 35 inches

<u />

<u>For the first portion</u>

2/5 x 35

2/1 x 7

= 14 inches

<u>For the second portion</u>

3/5 x 35

3/1 x 7

= 21 inches

To confirm: 14 + 21 = 35 inches

14 : 21

Divide both by 7

2 : 3

7 0
3 years ago
Х+ Зу = 6<br> бx — бу = 4
Sloan [31]

Answer:

the first one is x= 6-3y or if you are going to solve with the y it will be y =2 - x/3

the second one if you are solving for x it will be x= 2/3 + y if you are solving for y it will be x = 2/3 + x

Step-by-step explanation:

hope this helps

8 0
3 years ago
Read 2 more answers
One side of a square flower bed is 22 feet long. How many plants are needed if they are to be spaced 22 inches apart around the
Juli2301 [7.4K]
(22 ft)*(12 in/ft)/(22 in) = 12 . . . . plants per side

12*4 = 48 plants are needed for the outside border.
4 0
3 years ago
The area of a regular octagon is 35 cm 2 what is the area of a regular octagon with sides three times as large
Maurinko [17]
The area of a polygon = n*side^2 / (4 * tan(180/n))
where "n" is the number of sides

Let's calculate area for side = 2
area = 8*2^2 / (4 * tan(180/8))
area = 32 / (4 * tan(22.5))
area = 32 / 4*0.41421
<span> <span> <span> area = 19.3138746047 </span> </span> </span>

Now, let's calculate area for side = 6
area = 8*6^2 / (4 * tan(180/8))
area = 288 / <span> <span> <span> 1.65684 </span> </span> </span>
area = <span> <span> <span> 173.824871442 </span> </span> </span>

<span> <span> 173.824871442 </span> / </span><span><span>19.3138746047 = </span> 9

So, the area would be 9 times larger.

ALSO, looking at the formula
</span>n*side^2 / (4 * tan(180/n))
we can see that the side length appears just once in the formula and we are to square it in the calculation.  So, if we increase the side length is increased by 3, then the area increases by 3^2 or 9.


5 0
3 years ago
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