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Yakvenalex [24]
2 years ago
11

Evaluate the expression when y=4 y^2-5y+6

Mathematics
2 answers:
Dovator [93]2 years ago
7 0

Answer:

6

Step-by-step explanation:

4² x 2 - 5 x 4 + 6

16 x 2 - 20 + 6

32 - 20 + 6

12 - 6

6

Iteru [2.4K]2 years ago
6 0

Answer:

2

Step-by-step explanation:

y = 4

(4)^2 - 5(4) + 6

16 - 20 + 6

= 2

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One third of the sum of a number and four
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Can someone help me with this ASAP please?
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Answer:

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Step-by-step explanation:

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2 years ago
Jane spent 3 hours exploring a mountain with a dirt bike. First, she rode 55 miles uphill. After she reached the peak she rode f
Neko [114]

Answer:

Her speed on the summit was 35 mph.

Step-by-step explanation:

Her speed on the summit was "x" mph while her speed while climbing was "x - 10" mph. The distance she rode uphill was 55 miles and on the summit it was 28 miles. The total time she explored the mountain was 3 hours. Therefore:

time uphill = distance uphill / speed uphill = 55 / (x - 10)

time summit = distance summit / speed summit = 28 / x

total time = time uphill + time summit

3 = [55 / (x - 10)] + 28 / x

3 = [55*x + 28*(x - 10)]/[x*(x - 10)]

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3x² - 30*x = 83*x - 280

3x²  - 113*x + 280 = 0

x1 = {-(-113) + sqrt[(-113)² - 4*(3)*(280)]}/(2*3) = 35 mph

x2 = {-(-113) - sqrt[(-113)² - 4*(3)*(280)]}/(2*3) = 2.67 mph

Since her speed on the uphill couldn't be negative the speed on the summit can only be 35 mph.

6 0
3 years ago
Ruben sees 14 wheels on a total of 6 bicycles and tricycles. How many bicycles and tricycles are there?
Rina8888 [55]
4 bicycles 2 tricycles 
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5 0
3 years ago
Read 2 more answers
A cylinder had a diameter of 17 cm and a height of 11 cm. ehat is the volume of the cylinder​
tester [92]

Answer:

2496.78

Step-by-step explanation:

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3 years ago
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