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postnew [5]
3 years ago
13

Please help, I really need this

Mathematics
1 answer:
Nady [450]3 years ago
4 0

9514 1404 393

Answer:

  (a) -- the correct choice is highlighted

Step-by-step explanation:

The units of specific heat tell you what quantities make up the ratio.

  \dfrac{390\text{ J}}{1\text{ kg$\cdot^\circ$C}}=\dfrac{-12.0\text{ J}}{0.012\text{ kg}\cdot\Delta T}\\\\\Delta T=\dfrac{-12.0}{0.012\cdot390}\ ^\circ\text{C}\approx-2.56\text{ $^\circ$C}

The temperature will decrease by 2.56 C.

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The exterior angles of a triangle are 3y0, 4y0 and 5y0.
katovenus [111]

Answer:

i. 30 degrees

ii. 30 degrees

Step-by-step explanation:

The exterior angles of a triangle always add up to 360 degrees. Using this, you can set up the following equation.

3y+4y+5y=360

y=30 degrees

The smallest interior angle corresponds to the largest exterior angle. 5y=5*30= 150. Subtracting this from 180 you get 30 degrees, or the smallest interior angle. Hope this helps!

3 0
3 years ago
Read 2 more answers
In a group of 120 farmers, 65 grow maize and 75 grow cassava. Of these 35 grow both maize and cassava.
Simora [160]
30 farmers grow it I think.
5 0
3 years ago
The owners of a golf course hired a company to determine how many squirrels were living on their property. First, the company pu
muminat

Answer:

Squirrel population is 440 squirrels.

Step-by-step explanation:

It is given that there are 22 squirrels are marked.

Later the company returned and counted a total of 220 squirrels of which are marked were 11.

So, we can set up proportional equation to find the squirrel population.

Let squirrel population is x.

We can set up proportional equation as

\frac{11}{220}=\frac{22}{x}

Cross multiply

11 x=4840

Divide both sides by 11

x=440

Best estimate is 440.

6 0
3 years ago
Consider the following table. Is the relationship proportional? Explain your answer.
SpyIntel [72]

Answer:

No

Step-by-step explanation:

a proportional relationship must have a constant ratio to another quantity.

have a nice day and mark me brainliest! :)

8 0
3 years ago
Read 2 more answers
Someone help, this is kinda boring...
givi [52]

Answer:

Step-by-step explanation:

a+b =1\dfrac{3}{5} + (-2)\\\\=\dfrac{8}{5}-\dfrac{2*5}{1*5}\\\\=\dfrac{8-10}{5}\\\\\\=\dfrac{-2}{5}\\\\\\2-c = 2-[-7] = 2+7 = 9\\\\\\dfrac{- I a + b I}{2-c}=\dfrac{\dfrac{-2}{5}}{9}\\\\=\dfrac{-2}{5}*\dfrac{1}{9}\\\\=\dfrac{-2}{45}\\\\

8 0
2 years ago
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