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ziro4ka [17]
3 years ago
11

After swimming 50 feet below the surface of the water, a

Mathematics
1 answer:
marissa [1.9K]3 years ago
7 0

Answer:

20, c

Step-by-step explanation:

50-30=20 Go 50 down a number line from 50, you're at 0, then go back up 30. Where are you at? 20 Hope this helps! Have a good day! :)

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What is a equivalent ratio of 4 : 2
Igoryamba
8:4 is the equivalent ratio
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3 years ago
Use the given function to find the indicated value(s) of x. (Enter your answers as a comma-separated list.)
Nady [450]

Answer:

For f(x) = √(2·x + 2) - √(x + 18), at f(x) = -1 the possible x-values includes;

-0.757, -17.5

Step-by-step explanation:

Given that the function is f(x) = √(2·x + 2) - √(x + 18)

The value of 'x' when f(x) = -1, is given as follows;

-1 = √(2·x + 2) - √(x + 18)

-1² = (√(2·x + 2) - √(x + 18))² = 3·x + 20 - 2·√(2·x + 2)×√(x + 18)

1 = 3·x + 20 - 2·√(2·x + 2)×√(x + 18)

2·√(2·x + 2)×√(x + 18) = 3·x + 20 - 1 = 3·x + 19

2·x² + 38·x + 36 = (3·x + 19)/2

2·x² + 38·x + 36 - (3·x + 19)/2 = 0

4·x² + 73·x + 53 = 0

From which we get;

x = (-73 ± √(73² - 4 × 4 × 53))/(2 × 4)

x ≈ -0.757, and x ≈ -17.5

6 0
3 years ago
Please help me 15 points for doing both 3 and 4
vlada-n [284]

ok what you need in 3 and 4

4 0
3 years ago
Read 2 more answers
Write the following question expression in simplest binomial form 4(3x-2)-2(4x+5)
Oduvanchick [21]
4(3x-2)-2(4x+5) 

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4 0
3 years ago
A table is 4 ft high. A model of the table is 6 in. high. What is the ratio of the height of the actual table to the height of t
Sliva [168]

Answer:

8:1

Step-by-step explanation:

the actual table's height in inches is 4*12 = 48 inches.

48/6 = 8

so the ratio is 8:1.

5 0
3 years ago
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