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SVETLANKA909090 [29]
2 years ago
7

6.x = 4y2-12 (4y2 here means 4 y squared) Work out the value of x when y = 5

Mathematics
1 answer:
dezoksy [38]2 years ago
5 0

Answer:

88

Step-by-step explanation:

Given

x = 4y² - 12 ← substitute y = 5

x = 4(5)² - 12 = 4(25) - 12 = 100 - 12 = 88

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What is 8 and 7/12 times 3
Elza [17]
8\frac{7}{12} =  \frac{103}{12}
3=\frac{36}{12}

\frac{103}{12}×<span>\frac{36}{12}=</span>\frac{3708}{144}=\frac{103}{4}=23.75
7 0
3 years ago
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When an airplane leaves the runway, its angle of climb is 18 degrees and its speed is 275 feet per second. Find the plane's alti
Elodia [21]
Distance after 1 minute = speed * time = 275 * 60 = 16,500 feet
Let the altitude of the plane be y, then
sin 18 = y/16500
y = 16500 sin 18 = 5,098.78 feet
8 0
3 years ago
Please help!!! It's a quiz
xxMikexx [17]

Answer: 3,2.50)

Step-by-step explanation:

8 0
3 years ago
for the school play adult tickets cost 4$ and children tickets cost 2$ natalie is working at the ticket counter and just sold 20
lilavasa [31]
Let us formulate the independent equation that represents the problem. We let x be the cost for adult tickets and y be the cost for children tickets. All of the sales should equal to $20. Since each adult costs $4 and each child costs $2, the equation should be

4x + 2y = 20

There are two unknown but only one independent equation. We cannot solve an exact solution for this. One way to solve this is to state all the possibilities. Let's start by assigning values of x. The least value of x possible is 0. This is when no adults but only children bought the tickets.

When x=0,
4(0) + 2y = 20
y = 10

When x=1,
4(1) + 2y = 20
y = 8

When x=2,
4(2) + 2y = 20
y = 6

When x=3,
4(3) + 2y= 20
y = 4

When x = 4,
4(4) + 2y = 20
y = 2

When x = 5,
4(5) + 2y = 20
y = 0

When x = 6,
4(6) + 2y = 20
y = -2

A negative value for y is impossible. Therefore, the list of possible combination ends at x =5. To summarize, the combinations of adults and children tickets sold is tabulated below:

   Number of adult tickets             Number of children tickets
                  0                                                   10
                  1                                                    8
                  2                                                    6
                  3                                                    4
                  4                                                    2
                  5                                                    0




6 0
3 years ago
.. pls help me....!!!!! Determine whether the point (-2,4) satisfy y&lt;3x+5,y=3x+5 or y &gt;3x+5..​
nasty-shy [4]

Answer:

y > 3\cdot x + 5

Step-by-step explanation:

Let A(x,y) = (-2,4) and y = 3\cdot x + 5. Now we evaluate the given function at x = -2:

y = 3\cdot x + 5 (1)

y = 3\cdot (-2)+5

y = -6 +5

y = -1

Which means that y is less than the y-component of A. Therefore, the right answer is y > 3\cdot x + 5.

7 0
2 years ago
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