MATHEMATICS HIGH SCHOOL

Need help plz!!
XY = -4
need help plz!! XY = -4 - 1

Answers

Answer 1
Answer: the correct answer is v.

hope this helps!

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in an equation y varies directly as x varies. if y = 55 when x = 22, what is the value of x when y = 85?​

Answers

Answer:

x=34

Step-by-step explanation:

If you put Y and X into a ratio then it will be

5:2

because since their GCF is 11, then we will have to divide both of the numbers by 11.

If y=85 then that means that it was multiplied by 17. If we want them to stay within the same ratio, then we will have to multiply X (2) by 17.

That will get you 34.

The blue lake trail is 11 3/8 miles long. Gemma has hiked 2 1/2 miles each hour for 3 hours. How far is she from the end of the trail?

Answers

In the question it is given that the length of the blue lake trail is 11 3/8 miles. In the question it is also given that Gemma has hiked for a total time of 3 hours and each hour she has hiked 2 1/2 miles.
Now coming to solving the problem we get:
Total length of blue lake trail = 11 3/8 miles
                                             = 91/8 miles
Distance hiked by Gemma in 1 hour = 2 1/2 miles
                                                           = 5/2 miles
Then the total distance hiked by Gemma in 3 hours = (5/2) * 3
                                                                                   = 15/2 miles
The distance left to cover the full trail = (91/8) - (15/2) miles
                                                            = (91 - 60)/8 miles
                                                             = 31/8 miles
                                                             = 3 7/8 miles.
So Gemma is 31/8 miles or 3 7/8 miles from the end of the trail.

Sharon is decreasing the size of a diagram of a leaf that is 30 centimeters long by 10 centimeters wide, if the reduced diagram is 4 centimeters wide how long will it be?

Answers

Answer:

12 cm


Step-by-step explanation:

This is a proportionality/similarity problem.

10 cm turned to 4 cm. So by how much has it decreased? In other words, 10 multiplied by WHAT is 4?

10*x=4\nx=(4)/(10)\nx=0.4

0.4 is also known as the scale factor from the large diagram to the small diagram.

So how much would 30 cm become? It would be 30 multiplied by the scale factor, which is 0.4.

30*0.4=12

Hence, the length of the reduced diagram would be 12 cm.
x-length\n\nFrom\ proportion:\n\n(30)/(10)=(x)/(4)\n\n10x=120\ \ \ \ \ \ |:10\n\nx=12\n\nIt\ will\ be\ 12\ cm\ long

Tran is solving the quadratic equation 2x2 – 4x – 3 = 0 by completing the square. His first four steps are shown in the table.In which step did Tran first make an error?
Step 1
Step 2
Step 3
Step 4

Answers

The answer is Step 3.

Reggie and Courtney are picking up trash along the highway. Together they have collected 15 bags of trash.Courtney has collected 3 more bags then Reggie. How many bags have they each collected?

Answers

Bags collected by reggie and Courtney are 6, 9 respectively.

SOLUTION:

Given, Reggie and Courtney are picking up trash along the highway.  

Together they have collected 15 bags of trash.

Courtney has collected 3 more bags then Reggie.  

We have to find how many bags have they each collected?

Let the number bags collected by reggie be n, then number of bags collected by Courtney will be 15 – n.

Now, according to the given information,

Number of bags with Courtney = 3 + number of bags with reggie

15 – n = 3 + n

n + n = 15 – 3

2n = 12

n = 6

so, reggie collected 6 bags, then, Courtney collected 15 – 6 = 9 bags.

Hence, bags collected by reggie and Courtney are 6, 9 respectively

Diagonals AC and BD of a rhombus ABCD meet at O . If AC=8cm and BD=6cm , find sin √OCD.

Answers

Answer:

Hi,

Step-by-step explanation:

AC=8 => AO=OC=AC/2=4

BD=6 => BO=OD=3

sin(\widehat{OCD})\n\n=(OD)/(√(OD^2+OC^2))\n\n=(3)/(√(3^2+4^2) )\n\n\n=\boxed{(3)/(5)}
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