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ASHA 777 [7]
3 years ago
7

Help me pleaseI don't know how to do this ​

Mathematics
2 answers:
Vilka [71]3 years ago
8 0
I don’t either
Can someone please teach me
Angelina_Jolie [31]3 years ago
6 0
X = 1, Y = -1


You could do substitution :
x - y = 2
x = 2 + y
———————-
5(2 + y) + y = 4
10 + 5y + y = 4
10 + 6y = 4
6y = -6
y = -1
———————-
x - (-1) = 2
x + 1 = 2
x = 1
——————————
CHECK ANSWER :
5(1) + (-1) = 4
1 - (-1) = 2
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Answer:

$102.60

Step-by-step explanation:

i am pretty sure this is correct

8 0
3 years ago
7k-35=5(1+2k)+2k<br> Can you solve the question
kotykmax [81]

Answer:

7k-35=5+10k+2k

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or, -40=5k

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Therefore, k=-1/8

7 0
3 years ago
You earn a 90% on his science test you answer 18 questions correctly how many questions were on the test
Bogdan [553]
Hello there!

The correct answer is 20.

Hope This Helps You!
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8 0
3 years ago
Read 2 more answers
Which statements must be true?
slamgirl [31]

Answer:

The options 2,3 and 5 are correct.

Step-by-step explanation:

From the figure it is noticed that the points U,V and W are midpoint of JK,KL and JL respectively.

Midpoints theorem of triangle states that the line connecting the midpoints of two sides is parallel to third side and its length is half of the third side.

The points U and W are midpoint of JK and JL. Using midpoint theorem, we get

UW=\frac{1}{2}KL

UW\parallel KL

The points U and V are midpoint of JK and KL. Using midpoint theorem, we get

UV=\frac{1}{2}JL

UV\parallel JL

The points V and W are midpoint of KL and JL. Using midpoint theorem, we get

VW=\frac{1}{2}JK

2VW=JK

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7 0
4 years ago
Students in a random sample of 57 students measured their handspan. The dot plots display the results for the males and females.
Nat2105 [25]

Answer:

There is a difference in mean hand span between male and female if you notice the difference between their averages.    2cm  is quite significant

female mean = 19.6 cm  and male mean = 21.6 cm

Step-by-step explanation:

a.)  There is a significant difference.

take  P( Z  < ( 19.6 - 21.6) / 1)  = P(Z < -2) = 2% probability of assuming that male and female means are the same.  too low to think like that.

b.) Differ by 2cm.  MAD=  Mean Absolute Deviation , MAD within their own data set  seem similar

C.)  The variability in hand spans among male and female are very similar, since they both have the same MAD = 1.0

7 0
3 years ago
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