Answer:
1. 8.4 2. 15
Step-by-step explanation:
1. 4x+8y= 40
wen y= 0.8
4x+8×0.8=40
4x=40-8×0.8
4x= 40- 6.4= 33.6
....x= 33.6/4 = 8.4
2. 3a+b= 54
wen b= 9
3a+ 9= 54
3a= 54- 9
3a=45
.....a = 45/3 = 15
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Answer:
The length of the other diagonal is 10 units
Step-by-step explanation:
we know that
The area of a Rhombus is equal to
where
D1 and D2 are the diagonals of the rhombus
we have
substitute in the formula and solve for D2
Answer:
8 seconds.
Step-by-step explanation:
To solve this question, we need to find the time, , when , that is, when the height of the object above the ground is 0 feet.
Substituting feet per second and gives the quadratic:
Since 128 is divisible by 16, it can be reduced to .
We must now solve for .
We can easily see that one answer to the equation is 0,
(we need not concern ourselves with the 16 outside of the parenthesis as in the equation above, since 16 multiplied by 0 is 0). However this is the time the object is released into the air.
The second answer, is also easy to see by inspection:
.
Therefore the object lands 8 seconds after it is thrown.
It would be 5.
This is because 5 is the biggest number that 10 and 15 can divide with(without getting decimals or fractions). I hope this helped :)
Answer:
294.5 m²
Step-by-step explanation:
portion of circle is 360 - 130 = 230
πr²*x/360 = π(11.1)²*230/360 = 247.3
then add the non-right triangle area, 1/2ab sinC
1/2(11.1)(11.1) sin 130 = 47.2
247.3 + 47.2 = 294.5 m²