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kompoz [17]
3 years ago
11

Pls help me im so not smart lol

Mathematics
2 answers:
Len [333]3 years ago
8 0

Answer:

7

Step-by-step explanation:

1 x  3=

2x3=6

4x3=12

7x3=21

romanna [79]3 years ago
8 0

Answer:

7

Step-by-step explanation:

im not that smart either but i think tis the 3s

1 x3 = 3

2 x3 = 6

4 x3 =12

<u>7 </u> x3 = 21

if tht makes any sense

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Share £200 between Alice and Brian in the ratio 3 : 5<br>​
Pepsi [2]

Answer:

75:125=3:5

Step-by-step explanation:

1. Add the total number of parts

3+5=8

2. Find out how much one part is

200/8=25

3. Multiply each ratio by 25

3*25=75

5*25=125

4. Check they add up to 200

75+125=200

8 0
3 years ago
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Sliva [168]
The answer is invalid
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3 years ago
Adrian says that 4(-9)= 36. Why is Adrian incorrect?
xenn [34]

Answer:

4(-9)= -36

Step-by-step explanation:

Since there's a negative on the 9 it will affect the product. So the answer is supposed to be a - 36.

4 0
3 years ago
Please help!!!!!!!!!!
Gnoma [55]

Answer:

The surface of the prism is 84m²

Step-by-step explanation:

You have 4 figures here (two the same triangles)

you need to determine the surface of each and then sum it to one. This will be your final surface.

rectangles:

3*6= 18m²

5*6 = 30m²

4*6 = 24m²

triangles:

You need to determine the square of the triangles from the Heron's formula.

Heron's formula states that the area of a triangle whose sides have lengths a, b, and c is

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s=\frac{a+b+c}{2}.

So the permimeter of the triangle is

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p = 6m

S = \sqrt{p*(p-a)*(p-b)*(p-c)}  = \sqrt{6*(6-3)*(6-4)*(6-5)}  = \sqrt{6*3*2*1} =\sqrt{36} =6[m^{2} ]

So the surface of the prism is a total sum of all surfaces:

P = 18m²+30m²+ 24m²+2*6m² = 84m²

6 0
3 years ago
the table shows how the number of sit-ups Maria does each day has changed over time. At this rate, how many sit-ups will she do
tresset_1 [31]

Answer:

61

Step-by-step explanation:

a = 17

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17 + 44

61

8 0
3 years ago
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