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cricket20 [7]
3 years ago
7

Decrease £14132.77 by 14.5%Give your answer rounded to 2 DP​

Mathematics
1 answer:
TEA [102]3 years ago
4 0

Answer:

£12083.52

Step-by-step explanation:

Given amount:

      Amount  = £14132.77

Percentage decrease = 14.5%

Solution:

To decrease the given amount by 14.5% implies multiply it by:

                \frac{100-14.5}{100}  = 0.855

Now;

      Decreased amount  = £14132.77  x 0.855

      Decreased amount  = £12083.52

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Prove that if one solution for a quadratic equation of the form x 2 + bx + c = 0 is rational (where b and c are rational), then
erica [24]
x^2+bx+c = (x-r)(x-s)\\
x^2+bx+c = x^2-(r+s)x+rs\\\\
b = -(r+s)\\ c = rs

Say r is rational. Suppose for a second, that s is not. Then, r+s is irrational. But this contradicts the fact that b is rational.

So, if one root is rational, then the other root is also rational
7 0
4 years ago
So i need help with this question
lawyer [7]

Answer:

multiply both sides by 8

Step-by-step explanation:

I don't really know why I just know lol hope this helps

8 0
3 years ago
Find the equation of the line with Slope = 8 and passing through (3,28). Write your equation in the form
kvasek [131]

Answer:

y = 8x + 4

Step-by-step explanation:

y=mx+b

m=8

y = 8x + b

We just need to find b. B is where the line intersects the y- axis. On the y-axis by definition, the x-coordinate =0 but that is not helpful now...

Let's re write and try to solve for b. That means write as b = ...

y = 8x + b

b = y - (8x)

Substitute for x and y the numbers of the coordinates of the given point (3,28):

b = y - (8*x)

b = 28 - (8*3)

b = 28 - 24

b = 4

So the answer is y = 8x + 4

8 0
3 years ago
Please ✨help✨ I need this as soon as possible
attashe74 [19]
Yes they form a proportion the rate of change is 27.5
4*27.5=110
10*27.5=275
18*27.5=495
30*27.5=825
8 0
3 years ago
The ration of the theree angles of a triangle is 5:7:8.findt the measure of the smallest angle of the triangle.
Yuliya22 [10]

Answer:

Step-by-step explanation:The ratio of the measures of three angles of a triangle 5:7:8. Find the measure of each angle of the triangle. 5*9=45 answer for the smallest angle. 7*9=63 answer for the middle angle.

hope this helps and if im wrong sorry:)

3 0
3 years ago
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