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3 years ago

Expand and simplify 2(3a-5b)+4(a+2b)

Mathematics

2 answers:

hichkok12 [17]3 years ago

6 0

The answer is 10a-2b

olya-2409 [2.1K]3 years ago

5 0

Answer:

$10a - 2b$

That is the answer

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31 7/8 - 2/7 = what<br><br> please i really need the answers for my school

Fittoniya [83]

Answer:

9/2

Step-by-step explanation:

8 0

3 years ago

Which pair of angles are vertical angles?

RUDIKE [14]

The answer is C because the angle equal each other.

5 0

4 years ago

Read 2 more answers

A researcher believes that there is a difference in how cautious male stray cats and female stray cats are when approaching peop

Anika [276]

Answer:

The null hypothesis is that there is no difference in the mean number of male and female cats

H₀; μ₂ - μ₁ = 0

Step-by-step explanation:

The given parameters are;

The given percentage of male stray cat population = 50%

The given percentage of female stray cat population = 50%

The number of areas the researcher visits, n = 15

The number of stray male cats he finds = 11

The kind of test to be performed = Sign test

The significance level, α = 0.05

A) Therefore the null hypothesis is H₀; μ₂ - μ₁ = 0

The alternative hypothesis is Hₐ; μ₂ - μ₁ ≠ 0.

5 0

3 years ago

Solve the following system of equations by graphing and select the correct answer below:

LUCKY_DIMON [66]

The only answer is x = 4, y = 2,
2(4) + 6(2) = 20
3(4) _ 2(2) = 8
the graph is so easy, please try!!

5 0

4 years ago

Read 2 more answers

List all element of the following sets

ryzh [129]

Answer:

a) The elements are $\frac{1}{3},\frac{1}{4},\frac{1}{5},\frac{1}{6}$

b) The elements are (-∞ ...-1,0,1,2,..∞).

c) The elements are 2 and 3.

Step-by-step explanation:

To find : List all element of the following sets ?

Solution :

a) $\{\frac{1}{n}| n\in \{ 3 , 4 , 5 , 6 \} \}$

Here, The function is $f(n)=\frac{1}{n}$

Where, $n\in \{ 3 , 4 , 5 , 6 \}$

Substituting the values to get elements,

$f(3)=\frac{1}{3}$

$f(4)=\frac{1}{4}$

$f(5)=\frac{1}{5}$

$f(6)=\frac{1}{6}$

The elements are $\frac{1}{3},\frac{1}{4},\frac{1}{5},\frac{1}{6}$

b) $\{x\in \mathbb{Z} | x=x+1\}$

Here, The function is $f(x)=x+1$

Where, $x\in \mathbb{Z}$ i.e. integers (..,-2,-1,0,1,2,..)

For x=-2

$f(-2)=-2+1=-1$

For x=-1

$f(-1)=-1+1=0$

For x=0

$f(0)=0+1=1$

For x=1

$f(1)=1+1=2$

For x=2

$f(2)=2+1=3$

The elements are (-∞ ...-1,0,1,2,..∞).

c) $\{n\in \mathbb{P}| \text{n is a factor of 24}\}$

Here, The function is n is a factor of 24.

Where, n is a prime number

Factors of 24 are 1,2,3,4,6,8,12,24.

The prime factor are 2,3.

The elements are 2 and 3.

4 0

3 years ago