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klemol [59]
3 years ago
13

Help plzz (30) points for both of the question-plz help - this is life or dead answer

Mathematics
1 answer:
Elodia [21]3 years ago
8 0

Answer:

The answer is B) 11.

Step-by-step explanation:

We can solve this by making an expression to represent the situation. Let x = the number of student books in the box (what we're looking for):

2.3x + 4.3 + 0.4 = 30

2.3x + 4.7 = 30

2.3x + 4.7 - 4.7 = 30 - 4.7

2.3x = 25.3

2.3x/2.3 = 25.3/2.3

x = 11

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Katen [24]

Answer:

4-3=1

8+9=17

7 x 2= 14

Step-by-step explanation:

8 0
2 years ago
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Answer this one please
Fittoniya [83]

Answer:

105 cm²

Step-by-step explanation:

We can see that the area at the square at the bottom, since one side is 5, is 5²=25. Then, we know that the height of the triangles is 8, the base is 5, and there are 4 of them, so ((5*8)/2)*4=80. Add these up to get 105 as our total

4 0
3 years ago
Which pair of numbers is relatively prime?
tamaranim1 [39]
Not A.(17 is a common factor)
B.  only common factor is 1
not C  (7 is a common factor)
D.   only common factor is 1

Both B and D are relatively prime.

3 0
3 years ago
Each crate holds 25 reusable water bottles. Each crate costs $45. How much should the track team charge for each water bottle to
Reptile [31]

Answer:

$ 9 each bottle

Step-by-step explanation:

1 crate  = $45

1 crate  = 25 bottles

if we want to earn $180 per crate , we have to add this value to the $45

45 + 180 = 225

if the value of the box to win $180 is $225, we have to divide the new value by 25 (number of bottles) and we will have what we will have to charge each bottle

225/25 = 9

we have to charge $ 9 each bottle to earn $ 180 per crate

7 0
3 years ago
What is x(X2+3) please help me
malfutka [58]

Answer:

x(x²+3)

x³+3x

Step-by-step explanation:

Hope it helps you

6 0
3 years ago
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