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2 years ago

12

If y varies directly as x, and y = 25 as x = 5, find y for the x-value 7.

1 answer:

MrRissso [65]2 years ago

3 0

Hope the given solution helps:) Have a great day. Do mark me brainliest if it has really helped you. Thank You.

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photoshop1234 [79]

Answer:

25.56 is the surface area of the pool.

Hope this helps! :)

4 0

2 years ago

Read 2 more answers

In how many years will the interest on £100 at 6% amount to £12?

lesya [120]

Given:
Principal = <span>£100
Interest rate = 6%
Interest = </span><span>£12

Simple Interest is computed by multiplying the principal by its interest rate and term

Interest = Principal * rate * term
12 = 100 * 0.06 * term
12 = 6 * term
12/6 = term
2 = term

It will take 2 years for </span>£100 to earn <span>£12 at 6%</span>

3 0

2 years ago

Read 2 more answers

Write equation for the line in slope intercept form (6,4) and (3,8)

nikdorinn [45]

Answer: y = - 4x/3 + 12

Step-by-step explanation:

The equation of a straight line can be represented in the slope-intercept form, y = mx + c

Where c = y intercept

m represents the slope of the line.

m = (y2 - y1)/(x2 - x1)

y2 = final value of y

y 1 = initial value of y

x2 = final value of x

x1 = initial value of x

The line passes through (6, 4) and (3, 8),

y2 = 8

y1 = 4

x2 = 3

x1 = 6

Slope,m = (8 - 4)/(3 - 6) = 4/- 3 = - 4/3

To determine the y intercept, we would substitute x = 3, y = 8 and m= - 4/3 into y = mx + c. It becomes

8 = - 4/3 × 3 + c

8 = - 4 + c

c = 8 + 4

c = 12

The equation becomes

y = - 4x/3 + 12

5 0

2 years ago

If the cost of an item increased by a percentage and decreased by the same percentage, what would that percentage be if the new

Orlov [11]

The percentage, if the new cost was 84% of the original is 40%

Let the cost of the item be x.

When the price increased by y%, the new price is:

$New =x \times (1 + y\%)$

When the price decreased by the same percentage (i.e. y%), the new price is:

$New =x \times (1 + y\%) \times (1 - y\%)$

The cost is said to be 84% of the original price.

So, we have:

$x \times (1 + y\%) \times (1 - y\%) =84\% \times x$

Divide both sides by x

$(1 + y\%) \times (1 - y\%) =84\%$

Apply the difference of two squares

$1 - (y\%)^2 =84\% \\\\$

Subtract 1 from both sides of the equation

$- (y\%)^2 =-16\%$

Cancel out the common factors

$(y\%)^2 =16\%$

Take the square root of both sides

$y\% =0.4$

Multiply both sides by 100

$y =40$

Hence, the percentage is 40%

Read more about percentage change at:

brainly.com/question/809966

8 0

1 year ago

Please help due tomorrow

Salsk061 [2.6K]

Answer:

expression: x^3-2

If the number is 5: 123

Step-by-step explanation:

4 0

2 years ago