Round off then estimate 18.9*5.2
1 answer:
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Answer:
X=6 and Y=3
Step-by-step explanation:
Use SOHCAHTOA, SOH, Sin=Opposite/Hypotenuse, Therefore Sin60°=(3√3)/x ; Xsin60°=3√3 and Sin60° without using 4figuretable or calculator is √3/2, Now x=3√3 ÷√3/2 ;. therefore X=3√3×2/√3= 6. X=6 . Using Pythagoras theorem, 6²={(3√3)² +y²}. Y²= 36-27=9. Y=√9, Y=3. Therefore X=6 and Y=3.
Answer:
Step-by-step explanation:
From the given information, we already know two points the line intersects. It states that the line has a y-intercept of 3. The y-intercept is the point at which the line intersects the y-axis. Thus, the line also intersects (0,3). (Remember that all points on the y-axis have an x-value of 0.) Now we have enough information to write an equation.
1) Find the slope of the line with the slope formula, . Substitute the x and y values of (-5,2) and (0,3) into the formula and solve:
So, the slope of the line is .
2) Now we can write the equation in slope-intercept form, represented by the formula . Substitute values for
and
in the formula.
The represents the slope, so substitute
for it. The
represents the y-intercept, so substitute
for it. This gives the following answer and equation in slope-intercept form: