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Aneli [31]
3 years ago
7

How many quarts of pure antifreeze must be added to 5 quarts of a 10 ​% antifreeze solution to obtain a 20 ​% antifreeze​ soluti

on?
Mathematics
1 answer:
Black_prince [1.1K]3 years ago
4 0
Hey let’s be friends
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After substituting, what is the first operation performed when evaluating 5 + (9 x minus 3) divide 2 for x = 5? addition multipl
ludmilkaskok [199]

Answer:

<h2>Multiplication.</h2>

Step-by-step explanation:

The given expression is

5+(9x-3) \div 2

For x=5, we have

5+(9(5)-3) \div 2

Notice that the first operation we need to do is multiplication, because that's the right order of operations when we solve these kind of expressions.

5+(45-3) \div 2

Then, we subtract

5+42 \div 2

Now, we divide

5+21

Finally, we sum

26

Therefore, the right answer is multiplication.

4 0
3 years ago
Read 2 more answers
1. Write a two-column proof for the following conjecture. You may not need to use all of the rows of the two-column table provid
marshall27 [118]

Answer:  

Given: ABCD is a parallelogram.

Prove: Angle A and B are supplementary and C and D are supplementary.

That is, m∠A + m∠B = 180° and m∠C + m∠D = 180°


                Statement                                                Reason

1. ABCD is a parallelogram              1. Given  

2.m∠A=m∠C and m∠B=m∠D         2. Definition of parallelogram.

3.m∠A+m∠B+m∠C+m∠D=360°      3. Definition of quadrilateral

4. m∠A+m∠B+m∠A+m∠B=360°     4. By substitution

⇒ 2( m∠A + m∠B ) = 360°

⇒ m∠A + m∠B = 180°

Similarly, m∠C + m∠D = 180°

5.∠A and ∠C are supplementary,  5. Def. of Supplementary

∠ B and ∠D are supplementary

7 0
3 years ago
Read 2 more answers
Find the slope, or rate of change, from the table. *
Lemur [1.5K]

Answer:Answer:Answer:the change from the table is -q

Step-by-step explanation: 3x-5 = -15

and the other change Is the -21

3 0
3 years ago
What is the simplest form of expression?<br> sqrt 3 - sqrt 6<br> over<br> sqrt 3 + sqrt 6
andrew11 [14]
It's in a decimal form
3 0
3 years ago
Read 2 more answers
What expression is equivalent to 12x⁴ over 4x¹⁶
alexgriva [62]

Answer:

\frac{3}{x^1^2}

Step-by-step explanation:

\frac{12x^4}{4x^1^6}=3x^4/x^16

bring "x^4" to the bottom to subtract it with x^16

3/x^16*x^-4

3/x^12

hope this helps!

7 0
3 years ago
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