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Svetradugi [14.3K]

3 years ago

14

Rebecca sells greetings cards at £1.47 each. She donates 3 7 of this money to a charity. How much does the charity receive from

the sale of each card?

1 answer:

ANTONII [103]3 years ago

4 0

The charity receive £54.39 form the sale of each card.

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The graph of the function f(x)

Oksi-84 [34.3K]

Step-by-step explanation:

A special relationship where each input has a single output. It is often written as "f(x)" where x is the input value. Example: f(x) = x/2 ("f of x equals x divided by 2") It is a function because each input "x" has a single output "x/2": • f

4 0

3 years ago

I need help with this math question

Mandarinka [93]

Answer: 5 players on each team

Step-by-step explanation:

5+7+8= 4/20

5 0

3 years ago

If the point (a, b) is equidistant from the points (-a, 2) and (2, -b), then prove that 3(a+b)+4=0

erastova [34]

Answer: see proof below

<u>Step-by-step explanation:</u>

Since (a, b) is equidistant from (-a, 2) and (2, -b), then it is the midpoint of the those two points. Use Midpoint formula to find (a, b).

$M_x=\dfrac{x_1+x_2}{2}\qquad \qquad \qquad M_y=\dfrac{y_1+y_2}{2}\\\\\\a=\dfrac{-a+2}{2}\qquad \qquad \qquad \quad b=\dfrac{2-b}{2}\\\\\\2a=-a+2\qquad \qquad \qquad \quad 2b=2-b\\\\\\3a=2\qquad \qquad \qquad \qquad \qquad 3b=2\\\\\\a=\dfrac{2}{3}\qquad \qquad \qquad \qquad \qquad b=\dfrac{2}{3}$

3(a + b) - 4 = 0

$3\bigg(\dfrac{2}{3}+\dfrac{2}{3}\bigg)-4=0\\\\\\3\bigg(\dfrac{4}{3}\bigg)-4=0\\\\\\4-4=0\\\\0=0\qquad \text{TRUE!}$

<em>Notice that I changed the equation to "negative 4" because the equation you provided did not make a true statement.</em>

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4 0

3 years ago

What is the value of 7P5?<br><br> A.5040<br> B.2520<br> C.42<br> D.21

Marizza181 [45]

The answer is <span>B.2520
</span>
For permutation P we will use:
nPr = n!/(n-r)!
7P5 = ?
n = 7
r = 5
7P5 = 7!/(7-5)!
= (7 * 6 * 5 * 4 * 3 * 2 * 1)/2!
= 5040/(1 * 2)
= 5040/2
= 2520

5 0

3 years ago

Help pleaseeeee I’m confused

WITCHER [35]

Solution: x=4

Step by step solution:
Since it’s a scale copy the equation is 6/7.5=x/5
6/7.5=0.8
5*0.8=4
x=4

Hope that helps:)

3 0

3 years ago