Answer:
(x, y) = (4, 16)
Step-by-step explanation:
The first equation is a proportion, so you know right away that (0, 0) is on the graph. Pick any value you like for x, and y will be 4 times that. So, for example, the point (5, 20) will also be on the graph of y=4x.
The second equation has a y-intercept of 20 and a slope of -1. So, however many unit to the right of the y-axis you choose to go, the y-value will be down that number of units from 20. In addition to (0, 20), the point (5, 15) will be on the graph of y = -x+20.
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Personally, I like to use a graphing calculator to show the graphical solution.
Here, the solution is (x, y) = (4, 16).
Answer:
u=91
Step-by-step explanation:
-2=u-93÷-3
multiply both sides by 3
3(-2)=(u)3+(-93÷-3)3
-6=3u-279
add 279 to both sides
-6=3u-279
+279. +279
273=3u
divide by 3
273÷3=3u÷3
91=u
Answer:
Area of ABCD = 959.93 units²
Step-by-step explanation:
a). By applying Sine rule in the ΔABD,
Sin∠DBA = 
m∠DBA = 
m∠DBA = 45.64°
Therefore, m∠ADB = 180° - (110° + 45.64°) = 24.36°
m∠ADB = 24.36°
c). Area of ABCD = Area of ΔABD + Area of ΔBCD
Area of ΔABD = AD×BD×Sin(
)
= 35×46Sin(12.18)
= 339.68 units²
Area of ΔBCD = BD×BC×Sin(
)°
= 46×27×(0.4994)
= 620.25 units²
Area of ABCD = 339.68 + 620.25
= 959.93 units²
Answer:
x= 11.9 (3 s.f.)
Step-by-step explanation:
Please see attached picture for full solution.
Answer:
t=7(1.75c)
Step-by-step explanation:
If I assume that she does the same number of chores each day the equation is t=7(1.75c)
this is because c is the number of chores
and for each chore she earns 1.75 so then for each day it is 1.75c
there are 7 days in a week so you need to multiply that all by 7
so that is 7(1.75c)
that little equation finds the total amount earned so then it is
t=7(1.75c)
