2 years ago

Decrease £13.20 by 15% With an explanation (working out) plzzzz

Mathematics

1 answer:

algol [13]2 years ago

6 0

Answer:

£11.22

Step-by-step explanation:

100% = £13.20

50% = £6.60

10% = £1.32

5% = £0.66

so you would add 10% and 5% together which gives you 15% and 15% is £1.98

and then you could to £13.20 - £1.98 which equals to £11.22

You might be interested in

A rectangular Corn Hole area at the Recreation Center has a width of 5 feet and a length of 10 feet. If

inysia [295]

Answer:

2 feet

Step-by-step explanation:

Let

x ----> the uniform amount added to each side

we know that

The algebraic expression that represent this situation is

$(5+x)(10+x)=84$

solve for x

Apply distributive property

$50+ 5x+10x+x^2=84\\x^2+15x-34=0$

solve the quadratic c equation

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^2+15x-34=0$

$a=1\\b=15\\c=-34$

substitute in the formula

$x=\frac{-15\pm\sqrt{15^{2}-4(1)(-34)}} {2(1)}$

$x=\frac{-15\pm\sqrt{361}} {2}$

$x=\frac{-15\pm19} {2}$

$x=\frac{-15\pm19} {2}=2$

$x=\frac{-15\pm19} {2}=-17$

therefore

The solution is x=2 ft

8 0

3 years ago

Solve the equation 0.3 = -15z.

melamori03 [73]

Answer:

z = - 0.02

Step-by-step explanation:

0.3 = -15z

0.3 / -15 = z

-0.02 = z

6 0

3 years ago

Read 2 more answers

Takev0.7 from 1.3 answer please

torisob [31]

- - Let's solve:

$0.7-1.3$

- - Solve for that:

$
-0.6 
$

$(-.6)$

4 0

3 years ago

If one leg of a right triangle is 40 units and the other leg is 30 units, what is the length of the hypotenuse (in units)?

olchik [2.2K]

Answer:

20 or 50 units

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

Convert 2/5 to a decimal

Hoochie [10]

Answer:

0.40

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers