How many roots does the relation y = 4x² - 20x + 25 have? (2 marks)
1 answer:
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Answer:
See explanation.
Step-by-step explanation:
Part C)
When adding a positive to a negative, the result will be the sign of the larger absolute value. In this case, 10 is greater than 5, so the result will be negative.
Adding a negative is also the same thing as subtracting a positive.
For your second problem, 5 is larger than 3, so the result will be positive.
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When adding a positive to another positive, the result will be positive.
When adding a number to zero, the answer will always be the number.
Part D)
When multiplying a positive times a negative, the result will always be negative.
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When multiplying a positive times a positive, the result will always be positive.
When multiplying a positive or a negative times zero, the result will always be zero.
Answer:
Metallic Balloons = 74
Bunches of Helium Balloons = 38
Step-by-step explanation:
The question basically asks for the number of "metallic balloons" sold and the number of bunches of "helium balloons" sold.
We will do it in our way. Let B be number o metallic balloons and H be number of bunches of Helium balloons.
Since Metallics cost 2 each and Heliums cost 3.5 per bunch and totaled sales is 281, we can write and equation as:
2B + 3.5H = 281
and, since they sold 36 MORE metallic than helium ,we can write an equation as:
B - 36 = H
We can put 2nd equation in 1st one and solve for B first:
B = 74
Now, we find H:
H = B - 36
H = 74 - 36 = 38
H = 38