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solniwko [45]
4 years ago
7

Need help I don’t really get it!!

Mathematics
1 answer:
jeka57 [31]4 years ago
8 0

Answer:

13. no. the value changes when you solve for them

14. yes identity

15. yes commutative

16. yes commutative

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Solve the equation 3x + 1/2(2x + 6) = 6x + 1
grigory [225]

Answer:

x = 1

Step-by-step explanation:

3x + 1/2 (2x + 6) = 6x + 1

3x + x + 3 = 6x + 1

4x + 3 = 6x + 1

2 = 2x

x = 1

7 0
3 years ago
Find how many quarts of 6% butterfat milk and 3% butterfat milk should be mixed to yield 60 quarts of 4% butterfat milk.
Snezhnost [94]

Answer:

20 quarts of 6% butterfat milk and 40 quarts of 3% butterfat milk is used to make 60 quarts of 4% butterfat milk.

Step-by-step explanation:

We are given the following in the question:

Let x quarts of 6% butterfat milk be used and y quarts of 3% butterfat milk be used to make 60 quarts of 4% butterfat milk.

Thus, we can write the equation:

6\%\times x + 3\%\times y = 4\%\times 60\\6x + 3y = 240

Total amount of 3% butterfat milk = 60

Thus, we can write the equation:

x+y = 60

Solving the two equation, we get,

6x + 3y-(3x+3y) = 240 - 3(60)\\3x = 240-180\\3x = 60\\x = 20\\y = 60-20 = 40

Thus, 20 quarts of 6% butterfat milk and 40 quarts of 3% butterfat milk is used to make 60 quarts of 4% butterfat milk.

3 0
3 years ago
Solve for the value of d. <br>​
Yuki888 [10]

Answer:

d+7+3d+5=180

4d+12=180

4d=180-12

4d=168

d=42

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