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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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If edging cost $2.32 per 12-inch stone, and you want a double layer of edging around your flower bed that is 6 yards by 1 yard.
aksik [14]
12 inches = 1foot
1yard = 3feet
6yards = 18feet
Rerange the question:
If edging cost $2.32 per 1foot stone, and you want a double layer of edging around your flower bed that is 18feet by 3feet. How much will edging you flower bed cost?
Perimter:
2(18+3)=42
And since you want to double it; double the perimeter too.
42(2)=84

2.32(84)=194.88
7 0
3 years ago
Read 2 more answers
Which equation models a line that passes through point (-2,2) And has a slope of -8
trasher [3.6K]

So we will be using y=mx+b form, in which m = slope and b = y-intercept. Since we know the slope (-8), all we need to do is solve for the y-intercept. We can do this by inserting (-2,2) into the equation and solve for b.


2=-8(-2)+b


Firstly, do the multiplication: 2=16+b


Next, subtract 16 on both sides, and your answer will be -14 = b



Using the previous info we have, our equation is y = -8x - 14

8 0
2 years ago
In a volleyball game, a player on one team spikes the ball over the net when the ball is 10 feet above the court. The spike driv
Fynjy0 [20]

Answer:

4.75 seconds

Step-by-step explanation:

Initial height of the ball from the ground = 10 feet

Upward initial velocity given = 55 feet per second

Value of g ( acceleration due to gravity) = 32.2 feet per s²

Motion of the ball:

The ball first goes vertically upwards, gravity decelerates the body and it momentarily comes to rest at a point in its upward trajectory, which is the point of maximum height. From this point, to the ground, the ball behaves as a freely dropped body.

Till the ball reaches its maximum height:

u = + 55

v = 0 ( final velocity is zero)

a = - 32.2 (since it is deceleration)

we know that <em>v = u + at </em>

⇒    0 = 55 - 32.2t

⇒  t = 1.7 s

Also , we have <em>s = ut + (1/2)at²</em>

Here, s is the maximum height from the point where ball is thrown

So,     s = 55(1.7) - (0.5)(32.2)(1.7)(1.7)

⇒ s = 140 feet

So at a height of 140 feet + 10 feet (initial height) = 150 feet, the ball acts as a freely dropped body.

Here,      u = 0

               a = +32.2

               s= 150

<em>s = ut + (1/2)at²</em>

⇒  150 = 0.5 ( 32.2) (t²)

⇒  t² = 300/32.2 = 9.31

⇒ t = 3.05 sec

So total time = 1.7 + 3.05 = 4.75 seconds

8 0
3 years ago
15 = 2c + 7<br> Solve for c
DaniilM [7]

Step-by-step explanation:

15=2c+7

15-7=2c

8=2c

8/2=c

4=c

c=4

5 0
3 years ago
Read 2 more answers
8/3 = 3 (c + 5/3) how to solve step by step
Ludmilka [50]

Answer:

Step-by-step explanation:

8/3=3(c+5/3)

multiply both sides by 3

8=9(c+5/3)

divide both sides by 9

8/9=c+5/3

subtract 5/3 from both sides

c=8/9-5/3

change 5/3 to 15/9

c=8/9-15/9

c=-7/9

7 0
3 years ago
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