Which of the following is a correct interpretation of the expression -4 - (-7)?
2 answers:
Answer:
D
Step-by-step explanation:
So we have the expression:
First, simplify. Two negatives make a positive. Therefore, the -(-7) turns into +7:
When adding on the number line, we move to the right.
Therefore, the correct interpretation is the value 7 digits to the <em>right</em> of -4.
D is the correct answer.
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Answer:
x = 6
Step-by-step explanation:
<em>Let's solve y for x + 2y = 8.</em>
x + 2y = 8
2y = -x + 8
y = x + 4.
<em>Let's solve y for x - y = 5.</em>
x - y = 5
y = x - 5
<em>Since both equations have been solved for y, we can combine them together into one!</em>
x - 5 = x + 4
x x = 4 + 5
1.5x = 9
x = 6
Hope this helped! If not, please let me know!
Given:
The ratio of the cost of a shirt to the cost of a jacket is 2:5.
The jacket cost $240 more than the shirt.
To find:
The cost of the shirt and the cost of the jacket.
Solution:
Let x be the cost of the shirt.
The jacket cost $240 more than the shirt. So, the cost of Jacket is (x+240).
The ratio of the cost of a shirt to the cost of a jacket is 2:5. So,
Subtract 2x from both sides.
Divide both sides by 3.
So, the cost of shirt is $160.
Now, the cost of jacket is:
Therefore, the cost of shirt is $160 and the cost of jacket is $400.