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patriot [66]
3 years ago
14

I need help pls its due in 40 minutes

Mathematics
1 answer:
mina [271]3 years ago
4 0

Answer:

I am attaching photo hold on

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What is the name for the distance between the crest and trough of wave?
devlian [24]

Answer:

wave height

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Solve the simultaneous equations. You must show all your working to find x and y. 1/2x -3y = 9 5x y + y = 28
Anastaziya [24]

<em>The right question is:</em>

\frac{1}{2}x - 3y = 9

5x + y = 28

Answer:

<em></em>x = 6<em> </em>

y = -2<em></em>

<em></em>

Step-by-step explanation:

Given

\frac{1}{2}x - 3y = 9

5x + y = 28

Required

Solve for x and y

Make y the subject of formula in the second equation

y = 28 - 5x

Substitute y = 28 - 5x in the first equation

\frac{1}{2}x - 3(28 - 5x) = 9

Open the bracket

\frac{1}{2}x - 3*28 - 3*- 5x = 9

\frac{1}{2}x - 84 + 15x = 9

Collect Like Terms

\frac{1}{2}x  + 15x = 9+ 84

\frac{x}{2}  + 15x = 9+ 84

\frac{x+30x}{2} = 93

\frac{31x}{2} = 93

Multiply both sides by 2

2 * \frac{31x}{2} = 93 * 2

31x = 186

Divide both sides by 31

\frac{31x}{31} = \frac{186}{31}

x = \frac{186}{31}

x = 6

Recall that y = 28 - 5x

So;

y = 28 - 5 * 6

y = 28 - 30

y = -2

Hence;

<em></em>x = 6<em> and </em>y = -2<em></em>

8 0
3 years ago
Read 2 more answers
Janine wishes to conduct a poll to predict how many students will vote for her for class president. Which polling methods are li
vredina [299]
D since she is asking her friends who are just going to ask their friends
A. since only 5 are asked
4 0
3 years ago
A square has a perimeter of 12x + 52 units . Which expression represents the side length of the square in units?
Lapatulllka [165]

Answer:

3x+13

Step-by-step explanation:

Perimeter of square = 4 * length

Length = Perimeter/4

Length = (12x + 52)/4

Length = 3x+13

5 0
3 years ago
Please help me with this :/ I will give Brainiest! I just really need help. Please
ollegr [7]

Did you ever get the answer to this?

8 0
3 years ago
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