SOLVING SYSTEMS OF EQUASIONS BY ELIMINATION. -4x-2y=-12
4x+8y=-24

Answers

Answer 1

Answer: Your going to add the two equations to cancel out the x term. You get 6y=-36. Divide both sides by 6 and you get y=-6. Plug y in in your first equation and you'll get -4x-2(-6)=-12. Multiply the -2 by the -6 and you'll get -4x+12=-12. Subtract 12 from both sides and you get -4x=-24. Divide both sides by -4 and you get x=6. Your final answer is x=6, y=-6.

Answer 2

Answer: -4x-2y=-12
4x+8y=-24

Cancel out the x
6y=-36
Divide both sides by 6
y=-6

Substitute the value of y to any equation
-4x-2y=-12
-4x-2[-6]=-12
-4x+12=-12
-4x=-24
Divide both sides by -4
x=6

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How do u add 10 to 2 digits numbers

Answers

It depends. Multiples of 10 are:
10, 20, 30, 40, 50...........
And a 2 digit number can be anything between 10 and 99.

To comment: Rodney would have 39 pieces of fruit.

When adding 10 to any two digit number, increase the left digit by 1. For example 20+10= 30. 55+10=65. If a problem says 10+ (a number), you can reverse the order the numbers are in because of the commutative property of addition. Example: 10+50 eqauls 50+10. Both equations equal 60. Also, Rodney would have 39 pieces of fruit since 20+19 is 39.

ICE CREAM you are planning to make and sell ice creams at a schools sports event.

You expect to make and sell 300 ice creams

•You buy ice cream in 1 liter tubs. Each tub costs $2.
•you can fill ten cones from each tub.
•each empty cone cost 5¢
•you plan to sell each filled cone for 80¢

Before buying ice cream, you survey 60 people to find out what flavors they like. Here are the results of the survey:

1.) work out the quantities you need to buy and their costs.

2.) how much profit do you expect T. To make on the day?

Answers

1) you will need 30 tubs of ice cream which will cost £60 plus 300 cones which is £9 so added together it will be £69

kai picked 11 times as many blueberries as nico. Together they pick 936 bluebarries. how many blueberries did each boy pick.

Answers

Answer: Kai picked 858 blueberries and Nico picked 78 blueberries.

Step-by-step explanation: Given that Kai picked 11 times as many blueberries as Nico and together they picked 936 blueberries.

We are to find the number of blueberries that Kai and Nico picked.

Let x and y represents the number of blueberries that Kai and Nico picked respectively.

Then, according to the given information, we have

$x=11y~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)\n\nx+y=936~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)$

Substituting the value of x from equation (i) in equation (ii), we get

$x+y=936\n\n\Rightarrow 11y+y=936\n\n\Rightarrow 12y=936\n\n\Rightarrow y=(936)/(12)\n\n\Rightarrow y=78.$

And, from equation (i), we get

$x=11*78=858.$

Thus, Kai picked 858 blueberries and Nico picked 78 blueberries.

First you need to break it down. If Kai picked 11 times more blueberries then Nico, the amount of blueberries he picked multiplied by the amount of blueberries Kai picked would be 936. Nico had to have picked more blueberries then ten, because 10x11 is only 110, and that isnt 936. He had to have picked more then 20, because 20x11 is 222. And he picked more then 30 because 30x11 is only 333. Normally I would keep on doing this, and soon you will get to 85. Thats your answer, and i hope i kinda helped you

A pair of jeans costs $89.A Jean jacket costs twice as much. What is the total cost of a jean jacket and 4 pairs of jeans?

Answers

It is given here that the cost of a pair of jeans is $89. It is also given in the problem that a jeans jacket costs twice as much as the pair of jeans.
Now
The cost of the jeans jacket = (2 * 89) dollars
   = 178 dollars
Cost of 1 pair of jeans = 89
So
The cost of 4 pairs of jeans = (89 * 4) dollars
   = 356 dollars
So we come to know that the cost of a jean jacket is $178 and the cost of 4 pairs of jeans is $356.
Total cost for the jean jacket and 4 pairs of jeans = (178 + 356) dollars
   = 534 dollars
So $534 is the total cost of the jean jacket and 4 pair of jeans.

So far ,Monica has read 5/6 of a book.She has read the same number of pages each day for 5 days.What faction of the book does Monica read each day

Answers

you have to multiply 5/6 by 5 and you get 4 1/6

Answer:

thank you

Step-by-step explanation:

i was confused until you did the answer

Please Please Please Help in Questions 24 and 25!!!!! PLEASE!!!!

Answers

a, b and c are the zeros of a polynomial: w(x) = (x - a)(x - b)(x - c).

$24.\nw(x)=(x-6)[x-(-5-2i)][x-(-5+2i)]\n\nw(x)=(x-6)(x+5+2i)(x+5-2i)\n\nw(x)=(x-6)[(x+5)+2i][(x+5)-2i]\n\n\text{use}\ a^2-b^2=(a-b)(a+b)\n\nw(x)=(x-6)[(x+5)^2-(2i)^2]\n\n\text{use}\ (a+b)^2=a^2+2ab+b^2\ \text{and}\ (ab)^n=a^nb^n\n\nw(x)=(x-6)(x^2+2(x)(5)+5^2-2^2i^2)\n\nw(x)=(x-6)(x^2+10x+25-4(-1))\n\nw(x)=(x-6)(x^2+10x+25+4)$

$w(x)=(x-6)(x^2+10x+29)\n\n\text{use distributive property}\ a(b+c)=ab+ac\n\nw(x)=(x)(x^2)+(x)(10x)+(x)(29)+(-6)(x^2)+(-6)(10x)+(-6)(29)\n\nw(x)=x^3+10x^2+29x-6x^2-60x-174\n\n\text{combine like terms}\n\nw(x)=x^3+(10x^2-6x^2)+(29x-60x)-174\n\n\boxed{w(x)=x^3+4x^2-31x-174}$

$25.\nw(x)=(x-i)(x-(-i))(x-6i)(x-(-6i))\n\nw(x)=(x-i)(x+i)(x-6i)(x+6i)\n\n\text{use}\ a^2-b^2=(a-b)(a+b)\n\nw(x)=(x^2-i^2)(x^2-(6i)^2)\n\n\text{use}\ (ab)^n=a^nb^n\ \text{and}\ i^2=-1\n\nw(x)=(x^2-(-1))(x^2-6^2i^2)\n\nw(x)=(x^2+1)(x^2-36(-1))\n\nw(x)=(x^2+1)(x^2+36)\n\n\text{use distributive property}\ a(b+c)=ab+ac\n\nw(x)=(x^2)(x^2)+(x^2)(36)+(1)(x^2)+(1)(36)\n\nw(x)=x^4+36x^2+x^2+36\n\n\boxed{w(x)=x^4+37x^2+36}$

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SOLVING SYSTEMS OF EQUASIONS BY ELIMINATION. -4x-2y=-12 4x+8y=-24

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SOLVING SYSTEMS OF EQUASIONS BY ELIMINATION. -4x-2y=-12
4x+8y=-24