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Dmitry_Shevchenko [17]
3 years ago
5

The present temperature is 5°C. The weather forecaster expects the temperature to fall 8 degrees during the night. How cold will

it get?
A: -3°C
B: 3°C
C:-13°C
D: 13°
Mathematics
1 answer:
Reptile [31]3 years ago
8 0
The correct answer is A, -3 degrees Celsius.
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Find (4a-2b+c) - (5c + a - 4b)
Vladimir79 [104]
Removing the brackets gives 4a -2b +c -5c - a + 4b and then collect the like terms to get 3a + 2b - 4c
6 0
3 years ago
Compare each whole number in the following pairs. Insert the symbol < or > to make the statement true. a. 15 _____ 8 b. 4
katrin2010 [14]
Insert the symbol < or > to make the statement true.
a) >
b) <
c) <
d) >

Replace each ? with the symbol = or ≠ to make the statement true.
a) ≠
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3 0
3 years ago
How many ounces of a 15​% alcohol solution must be mixed with 4 ounces of a 20​% alcohol solution to make a 17​% alcohol​ soluti
sukhopar [10]

Answer:

6 ounces

Step-by-step explanation:

Let x = the number of ounces of the 15% alcohol solution needed to be mixed with the 4 ounces of 20% alcohol solution to obtain the 17% alcohol solution.

After converting the percentages to their decimal equivalents, set up the necessary equation as follows:

0.15x+0.20(4) = (x+4)(0.17) Simplify and solve for x.

0.15x+0.8 = 0.17x+0.68 Subtract 0.15x from both sides.

0.8 = 0.02x+0.68 Now subtract 0.68 from both sides.

0.12 = 0.02x Finally, divide both sides by 0.02

x = 6

You need to mix 6 ounces of 15% alcohol solution with 4 ounces of 20% alcohol solution to obtain 10 (x+4)ounces of 17% alcohol solution.

7 0
2 years ago
Read 2 more answers
I don’t understand these
BaLLatris [955]
So these are basically isolating the variables.
The first equation is 3g + 5 =17.
In order to isolate the variable, we would have to get g by itself, that means 5 would have to go. In order to do this, we would do the opposite. Since it is positive 5 we would add negative 5, in order for it to disappear. This works because a positive 5 and negative 5 cancel each other out. Whatever you do to one side of the equation you have to do to the other, since we subtract 5 on one side we have to subtract 5 on the other. Therefore we would do 17-5.
Now we have 3g=12
We know that 3g is basically 3 multiplied by g. The opposite of multiplication is division.Therefore we would divide by 3 on both sides.
The answer to the first question would be g= 4.
And if you want to check if your answer is correct you plug the value in.
So
3(4) + 5 =17


5 0
3 years ago
Solve this for me plzzzz and thxxx
Shkiper50 [21]

answer: (-6,6) that's youre answer

5 0
3 years ago
Read 2 more answers
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