MATHEMATICS HIGH SCHOOL

2(3x+4y)=4x+12y
 solve

Answers

Answer 1
Answer: 6x + 8y = 4x + 12y
6x - 4x = 12y - 8y
2x =  4y
x = 2y
Answer 2
Answer: is it x=2y?
Because  6x+8y=4x+12y
=>2x+8y=12y
and 2x=4y, so x=2y                         

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I really need help with that
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True or False:No Explanations Needed

If two figures are similar then they are congruent.

If the ratios of the length of corresponding sides of the two triangles are equal then the triangles are congruent

if triangles are similar then the have the same shape

if two triangles are congruent then each pair of corresponding angles are congruent

if two angles of one triangle are congruent to corresponding angles of another triangle then the triangles are similar

Answers

hey there is see you need help well i am here to do just that 
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true
true
true
true

hope this helps
the answer is true to all of them.

Sunday: 1 1 2 Monday: 1 Tuesday: 2 1 2 Wednesday: 1 3 4 Thursday: 2 Friday: 1 1 2 Saturday: 2 Jenna is a swimmer and trains every day. The schedule shown outlines the number of hours she trains each day. If she misses the Wednesday practice, what is the total number of hours that she trains? A) 10 1 2 hours B) 10 C) 11 3 4 hours D) 12 hours

Answers

12 1\4

yeppppp thats tghe answer btw what school do yall go to?

Find the next two terms in the following sequence.

13, -5, -35, -77,...

Answers

13;-5;-35;-77;...\n\na_n=19-6n^2\n\na_1=19-6\cdot1^2=19-6=13\n\na_2=19-6\cdot2^2=19-6\cdot4=19-24=-5\n\na_3=19-6\cdot3^2=19-6\cdot9=19-54=-35\n\na_4=19-6\cdot4^2=19-6\cdot16=19-96=-77\n\na_5=19-6\cdot5^2=19-6\cdot25=19-150=-131\n\na_6=19-6\cdot6^2=19-6\cdot36=19-216=-197

James paddles upstream in a canoe at 2mph (relative to the shore), and when he paddles down-stream, he goes 9mph. Find the speed of the current and the speed James can paddle in still water and come up with an equation.

Answers

Let x represent James's speed and y represent the speed of the current. Since upstream the current goes against him, x-y=2 describes the speed upstream, and since downstream the current goes with him, x+y=9 describes the speed downstream.

Use elimination to solve for x: x-y=2 \n -(x+y=9) \n =-2y=-7 \n y=7/2 or 3.5 miles per hour for James in still water. Substitute y into either original equation: x-(7/2)=2 \n x=11/2 or 5.5 miles per hour for the current. As far as an equation, you can use y=(11/2)x, where x is the number of hours James has paddled in still water and y is the distance he has traveled (in miles). 
Not sure what equation you're looking for, but against the current he goes 2 mph and with he goes 9mph, so 9-2=7mph difference between them, divided by 2 = 3.5 mph of the current. So in this case, James can paddle 2+3.5= 5.5 mph in still water and the current moves at 3.5 mph.


James can paddle 5.5 mph
The current moves at 3.5 mph
Equation: speed = 5.5 + 3.5x where x can equal -1, 0, or 1 depending on whether James is going with the current (x = 1), without the current (x = 0), or against the current (x = -1)

What is the property, transformation, or simplification used in each step of this problem?    x-7=34                                                                                                                                         x-7+7=34+7                                                                                                                                 x+0=34+7                                                                                                                               x=34+7                                                                                                                                       x=41

Answers

Well, from the first row to the second you added +7 on both sides. On the other rows you merely did some arithmetic.
Usually one gets from the first line to the last one directly :)

861 ÷3 show work for this problem please

Answers

861 divided by 3: 

How many times does 3 go into 8? 2 x 3 = 6 
Subtract 6 from 8 to get a remainder of 2, and bring down 6 to get 26. 

How many times does 3 go into 26? 8 x 3 = 24
Subtract 24 from 26 to get a remainder of 2, and bring down 1 to get 21. 

How many times does 3 go into 21? EXACTLY 7 times. 7 x 3 = 21

Collect all numbers in bold to get…. 287!

Therefore, 861 divided by 3 = 287. 
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Mrs. Moore's class is conducting an experiment to find the probability of pulling certain colors from a bag of 25 marbles. If 8 are purple, 3 are yellow, 6 are green, and the rest are black, what is the probability of drawing 2 black if the marbles are not replaced after they are picked? Show answer as a percent rounded to nearest hundredth, if necessary.A. 8.96% B. 10.24% C. 9.33%