Let xy be this number, where x is the tens and y, the units.(xy is not the product of x times y, it's just a number with 2 digits))
(Mind you xy can be written as 10x+y, just like 25 - 2.10 + 5)
Now let's translate English into Math:
1) x+y =7 (note that the reverse of xy is yx or 10y+x)
2) 10y+x = (10x+y) -9 →-9x +9y = -9
1) x+y =7
2) - 9x +11y = -9
Solving these equations will give:
x = x=4 and y = 3. Hence the number is 43
Answer:
C
Step-by-step explanation:
Divide 4.5 by 3 = 1.5
1.5 x 3 = 4.5
The slope intercept form is given as y = 2x + 6
The general expression for slope intercept form is given as:
y = mx + c
where, m = slope
c = intercept
The formula for slope intercept form when we have been given the coordinates of a point and slope is given as :
(1)
where ( = the coordinates of a point
m = slope of the line
putting the required values in equation (1) we get
(y - 4) = 2(x- (-1))
(y - 4) = 2(x+1) [As (-)*(-) = +]
y - 4 = 2x + 2
y = 2x + 2 + 4
y = 2x + 6
Thus the slope intercept form is y = 2x + 6
Learn more about slope intercept form here : brainly.com/question/19440459
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Answer:
- P(Yellow)=0.25
- P(Not Red)=0.65
Step-by-step explanation:
P(Red)=0.35
P(Green)=0.4
(a)Since there are three colours inside the bag
P(Red)+P(Green)+P(Yellow)=1
0.35+0.4+P(Yellow)=1
P(Yellow)=1-(0.35+0.4)
P(Yellow)=0.25
(b) In probability, the sum of an event and its complement is 1.
Therefore:
P(Red)+P(Not Red)=1
0.35+P(Not Red)=1
P(Not Red)=1-0.35
P(Not Red)=0.65
Answer:
D.
Step-by-step explanation:
It's impossible to know if either A or B is true based on the information given to us in the diagram, so it cannot be A or B. C is false because all three of the angles in a triangle add up to 180°, and the equation in C only includes two angles. So the answer is D because it is the only statement we know to absolutely be true. Both angles three and four share one line (a line is 180°), so their sum must be 180°.