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Zepler [3.9K]
3 years ago
6

Help please I’ll give you 25 points

Mathematics
1 answer:
Ira Lisetskai [31]3 years ago
4 0

Answer: Choice D) y = \pm \sqrt{x+5}

The steps to finding the inverse will have us swap x and y. Afterward, we solve for y

y = x^2 - 5 \\\\x = y^2 - 5 \\\\x+5 = y^2 \\\\y^2 = x+5 \\\\y = \pm \sqrt{x+5} \\\\

------------------------------

Extra info:

The inverse relation is not a function because of the plus minus. For instance, plugging x = 4 into y = \pm \sqrt{x+5} leads to y = -3 and y = 3 simultaneously. You would have to apply a domain restriction on y = x^2-5 to make it a one-to-one function, to make the inverse a function. One possible domain restriction is x > 0 which would lead to the inverse function y = \sqrt{x+5}

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The function a(1) =1/2I^2 describes the area of an isosceles right triangle with leg I. Make a table of values for I=1,2,3 and 4
prohojiy [21]

Functions can be represented using equations, graphs and tables.

The function is given as:

a(l) = \frac 12 l^2

When l = 1, we have:

a(1) = \frac 12 \times 1^2

a(1) = 0.5

When l = 2, we have:

a(2) = \frac 12 \times 2^2

a(2) = 2.0

When l = 3, we have:

a(3) = \frac 12 \times 3^2

a(3) = 4.5

When l = 4, we have:

a(4) = \frac 12 \times 4^2

a(4) = 8.0

Represent the above results as a table, we have:

<u>l          a(l)</u>

1          0.5

2         2.0

3          4.5

4          8.0

Read more about tables and functions at:

brainly.com/question/13136492

8 0
2 years ago
Mary needs to order pizza for 18 students. Each student should get 4/7 of a pizza. How many pizzas should Mary order? How much p
Llana [10]

Answer:

11 pizzas, 5/7 left

Step-by-step explanation:

to find out how much pizza is needed, multiply 4/7 by 18 to get 72/7. round up to get 77/7 or 11 pizzas. 77/7 - 72/7= 5/7 so there will be 5/7 left over

3 0
2 years ago
Read 2 more answers
What is the value of 4/15, divided by, 2/ 3?<br> help plzzz
fgiga [73]

Answer: 2/5

Step-by-step explanation:  Dividing two fractions is the same as multiplying the first fraction by the reciprocal (inverse) of the second fraction

Take the reciprocal of the second fraction by flipping the numerator and denominator and changing the operation to multiplication. Then the equation becomes

The, multiply the numerators and denominators and get 12/30, then simply by 6 and get 2/5

5 0
2 years ago
Chad is planning on painting his bedroom and the living room. His rectangular bedroom measures 10 feet by 12 feet and each wall
rosijanka [135]

Answer:

The correct answer is 3 × 5 + 3 × 7 + 6 × 7 = 78 square feet.

Step-by-step explanation:

Measures of Chad's window is 36 inches by 60 inches = 3 feet by 5 feet.

Area of the window is 15 square feet.

Measures of Chad's door is 36 inches by 84 inches = 3 feet by 7 feet.

Area of the door is 21 square feet.

Measures of Chad's closet is 72 inches by 84 inches = 6 feet by 7 feet.

Area of the closet is 42 square feet.

Equation to show the total area of window, door and closet is 15 + 21 + 42 = 78 square feet.

6 0
2 years ago
Devin ran 6 over 10 miles on Thursday.He ran 1.5 miles on Saturday. How many total miles didi he run
Diano4ka-milaya [45]

Answer:

17.5 miles

Step-by-step explanation:

6+10+1.5= 17.5

8 0
3 years ago
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