If 5x+4y=23 and 4x+5y=22, then what is the value of (x + y)
Answers
Answer:
x=3 and y=2
Step-by-step explanation:
I plugged in a lot of numbers until it worked out.
5(3) + 4(2) = 15+8 which equals 23
then 4(3) + 5(2) = 12+10 which equals 22.
hope that helps!
3+2=5
yay
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Answers
Working
Take 6 to the other side
x^2+4x = 6
Find the 3rd for the left hand side:
x^2+4x+ (4/2)^2= 6 + (4/2)^2
Factoring the LHS gives
(x+2)^2=10
Finding square roots on both sides:
x+2=square root of 10
x+2= +3.1623 or - 3.1623
x=3.1623-2
=1.16
or
x= -3.1623 - 2
= - 5.16
Answers
Answer:
-192
Step-by-step explanation:
x = -8
y = 2
(4y)² −(2x)² =
(4(2))² −(2(-8)² =
(8)² − (-16)² =
64 − 256 = -192
Answers
Frequency- 31 33 9 2
Answers
Based on the results, the chance that a random donor has type A blood is; 11/25
How to find the Probability?
We are told that there was a survey of 75 blood donors.
Now, we want to find the chance that a random donor has type A blood. From the given table, we see that there are 33 type A blood donors. Thus;
P(donor has type A blood) = 33/75 = 11/25
Read more about Probability at; brainly.com/question/251701
#SPJ5
Answers
Answer:
The required algebraic rule of translation is .
Step-by-step explanation:
The coordinates of a point are C(5, –4) and the coordinates of image are C’(–2, 1).
.... (1)
Let the algebraic rule of translation is
.... (2)
From (1) and (2) we get
The value of a is -7.
The value of b is 5.
The algebraic rule of translation is
Therefore the required algebraic rule of translation is .
(x, y) (x + a, y + b) = (5,-4) (-2,1)
So, plugging in the values and solving for a and b,
5 + a = -2
a = -8
-4 + b = 1
b = 5
Therefore, the translation is
(x,y) (x - 8, y +5)
Answers
Answer:
y = 7
Step-by-step explanation:
Given
4y - 6 = 2y + 8 ( subtract 2y from both sides )
2y - 6 = 8 ( add 6 to both sides )
2y = 14 ( divide both sides by 2 )
y = 7