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4 years ago

Can someone please help

Mathematics

2 answers:

Dafna1 [17]4 years ago

7 0

The solution to the system of equations is A

Lelechka [254]4 years ago

6 0

Answer:

Step-by-step explanation:

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Me.Turners class is making a large round spinner to use in math class.if the spinner has a radius of 3 feet, what is the area,of

ozzi

Area of a circle = pi x r^2

A = pi x (3)^2

A = pi x 9

A = 9pi ft^2 = 28.27 ft^2

Hope this helps!! :)

6 0

4 years ago

Read 2 more answers

PLEASE HELP HURRY!!!!!!!

Charra [1.4K]

As it has been given that $x=4+5i$ , $y=2-9i$ .

We need to find the value of the following:

(i) $4x-y$ , substituting the value of 'x' and 'y' in the expression, we get:

$4(4+5i)-(2-9i)=4\times 4+4\times 5i-2+9i=16+20i-2+9i$

$=14+29i$

So, $4x-y=14+29i$

(ii) $-x+3y$ , substituting the value of 'x' and 'y' in the expression, we get:

$-(4+5i)+3(2-9i)=-4-5i+3\times 2-3 \times 9i=-4-5i+6-27i$

$=2-32i$

So, $-x+3y=2-32i$

(iii) $x \times y$ , we need to substitute the value of 'x' and 'y' in the expression, for this, we can use distributive property of multiplication that says,

$a(b+c)=a \times b+ a \times c$

Using the distributive property of multiplication:

$(4+5i)\times(2-9i)=4 \times 2-4 \times 9i+5i \times 2-5i \times 9i$

$=8-36i+10i-45i^2$

Now, we know that $i \times i=i^2=-1$

We get, $8-36i+10i-45 \times (-1)=8-26i+45$

$=8+45-26i=53-26i$

Therefore, $x \times y$ = $53-26i$ .

(iv) We have, $2x \times y$ , we need to substitute the value of 'x' and 'y' in the expression, we get:

$2(4+5i)\times (2-9i)$

Again, we can use distributive property of multiplication that says,

$a(b+c)=a \times b+ a \times c$

So,

$2(4+5i) \times (2-9i)=2\times 4+2 \times 5i\times(2-9i)$

$=8+10i \times(2-9i)=8\times 2-8 \times 9i+10i \times 2-10i \times 9i$

$=16-72i+20i-90i^2$

since, $i^2=-1$

we get,

$16-72i+20i-90 \times (-1)=16-52i+90$

$=106-52i$

Therefore,

$2x \times y=106-52i$

7 0

4 years ago

Read 2 more answers

8. Complete each equivalent fraction. 2 a = ( ) 3 48

noname [10]

First cross-multiply 48×2= 96
Next do 96÷3= 32
So the answer should be 32.

5 0

3 years ago

Read 2 more answers

company a operates stores under multiple banners in 34 states in the us a. how many states do not have a store operated by compa

olga nikolaevna [1]

Answers: 16 states and $\frac{16}{50}$

Explanation:

Question A involves finding the number of states that do not have a store operated by company A. This can be easily found by subtracting the number of states where the company operates stores, which is 34 states, from the total of states, which is 50.

50 - 34 = 16

This means 16 states do not have a store operated by this company

Question B involves writing a fraction to represent the number of states that do not have a store operated by the company. A fraction includes a numerator (top number) that represents the parts selected (number of states without a store: 16), and a denominator, which is the total of parts (total of states: 50). Thus, the fraction is $\frac{16}{50}$ . Moreover, this can be simplified as $\frac{8}{25}$ by dividing both numbers by the seame number (2).

8 0

3 years ago

Given the expression below. What will the sign of the product be? Justify you're answer.

alexdok [17]

The sign of the answer would be negative

Because their are odd number of negative signs

8 0

3 years ago