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Veronika [31]
2 years ago
13

What is the 3rd term in (a-3b)^6

Mathematics
1 answer:
kow [346]2 years ago
8 0
The answer for this question would be: -540a^3 b^3
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Pls solve the simultaneous equation in the attachment.
siniylev [52]

Answer:

Part a) The solution is the ordered pair (6,10)

Part b) The solutions are the ordered pairs (7,3) and (15,1.4)

Step-by-step explanation:

Part a) we have

\frac{x}{2}-\frac{y}{5}=1 ----> equation A

y-\frac{x}{3}=8 ----> equation B

Multiply equation A by 10 both sides to remove the fractions

5x-2y=10 ----> equation C

isolate the variable y in equation B

y=\frac{x}{3}+8 ----> equation D

we have the system of equations

5x-2y=10 ----> equation C

y=\frac{x}{3}+8 ----> equation D

Solve the system by substitution

substitute equation D in equation C

5x-2(\frac{x}{3}+8)=10

solve for x

5x-\frac{2x}{3}-16=10

Multiply by 3 both sides

15x-2x-48=30

15x-2x=48+30

Combine like terms

13x=78

x=6

<em>Find the value of y</em>

y=\frac{x}{3}+8

y=\frac{6}{3}+8

y=10

The solution is the ordered pair (6,10)

Part b) we have

xy=21 ---> equation A

x+5y=22 ----> equation B

isolate the variable x in the equation B

x=22-5y ----> equation C

substitute equation C in equation A

(22-5y)y=21

solve for y

22y-5y^2=21

5y^2-22y+21=0

Solve the quadratic equation by graphing

The solutions are y=1.4, y=3

see the attached figure

<em>Find the values of x</em>

For y=1.4

x=22-5(1.4)=15

For y=3

x=22-5(3)=7

therefore

The solutions are the ordered pairs (7,3) and (15,1.4)

3 0
3 years ago
The graph shows y in direct variation with x. Find the value of Y when X=-15
telo118 [61]
Y = 2x
y = 2*(-15) = -30 . . . . . selection A is appropriate
6 0
3 years ago
144 coins are divided equally among some children. If there were 3 children fewer, each child would have 16 coins. How many chil
enot [183]

Answer:

12

Step-by-step explanation:

144/16=9

Each child gets sixteen coins if there are nine children.

9+3=12

There are three more children so there are twelve.

8 0
3 years ago
4x + 7 PLEASEE HELPPPPPPPPPPP
nasty-shy [4]

Answer:

thats the simplest form it can be unless you want it expressed as a graph ....

7 0
2 years ago
Read 2 more answers
Which of the following is an extraneous solution of -3 x-2= x+2?
Svetlanka [38]

Answer:

x =(-1)

Step-by-step explanation:

There you go, buddy!

5 0
3 years ago
Read 2 more answers
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