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3 years ago

Who of the following functions is graphed

Mathematics

1 answer:

erastovalidia [21]3 years ago

5 0

The following function would be a or d

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Simplify by combining like terms. -4a + b + 9 + a -b-3 plz help !

Sedaia [141]

Answer:

- 3a + 6

Step-by-step explanation:

subtract and add like items together like

- 4a + a = -3a

b-b= 0

and

9-3 = 6

so the answer is

-3a +6

3 0

3 years ago

Suppose the sample space for a probability experiment has 8 elements. If elements from the sample are selected without replaceme

Gwar [14]

Answer: Number of ways $=\dfrac{8!}{8!0!}\ or \ 1$

Step-by-step explanation:

When there is no replacement , we use combination to find the number of ways to choose things.

Number of ways to choose r things out of ( with out replacement) = $^nC_r=\dfrac{n!}{r!(n-r)!}$

The number of ways to choose 8 things = $^8C_8=\dfrac{8!}{8!(8-8)!}=\dfrac{1}{0!}=1 [\because 0!=1]$

Hence, Number of ways $=\dfrac{8!}{8!0!}\ or \ 1$

5 0

2 years ago

I need the answer quickly please

Hoochie [10]

Answer:

c²=√181=13.45, or 13.5

Step-by-step explanation:

The pythagorean theorem is a²+b²=c²

Given this, we will plug in our numbers like this: 9²+10²=c²

9²+10²=181, but we have to find the square root of that.

c²=√181=13.45, or 13.5

I hope this helps!! :)

7 0

2 years ago

Read 2 more answers

A rectangle is 12m longer than it is wide. Its perimeter is 68m. Write and equation and show steps to find its length and width.

Galina-37 [17]

Answer:

length: 23 m; width: 11 m.

Step-by-step explanation:

The perimeter of a rectangle is twice the sum of its length and width, so that sum is 34 m. Then you can write two equations in length and width:

l + w = 34

l - w = 12

Adding these together gives you ...

2l = 46

l = 23 . . . . . . divide by 2

Then the width is

w = 23 -12 = 11

The length and width are 23 m and 11 m, respectively.

4 0

3 years ago

Lindsay is 5 years younger than Mark. Seven years ago, the sum of their ages was 31.

Rashid [163]

Answer:

The present age of Mark is 25 years.

And present age of Lindsay is 20 years.

Step-by-step explanation:

Let us assume:

The present age of Lindsay = l

The present age of Mark = m

⇒ Age of Lindsay seven years ago = (l -7) years

and Age of Mark seven years ago = (m -7) years

According to question:

Lindsay is 5 years younger than Mark ⇒ l = m - 5

Seven years ago, the sum of their ages was 31 ⇒ (l-7) + (m -7) = 31

So, the given set of equation are:

l = m - 5 ......... (1)

(l-7) + (m -7) = 31

⇒ ((m - 5) -7) + (m -7) = 32 (from (1)

or, m -12 + m - 7 = 31

or, 2m = 31 + 19 = 50

⇒ m = 50 / 2 = 25, or m = 25

Hence,the present age of Mark = 25 years

So,the present age of Lindsay = 25 - 5 = 20 years

7 0

3 years ago