Answer:
7) The first option. m<E = 20, m<D = 20
8) 3,257m
Step-by-step explanation:
Answer:
As there is one math problem over there.
Lets see the question first:
It says that "A hair dryer is rated
,if you use the dryer for
.How much electric energy do you use ?"
Final answer = Electic energy ![=0.3\ kW\ h](https://tex.z-dn.net/?f=%3D0.3%5C%20kW%5C%20h)
Step-by-step explanation:
Electrical Energy
.
The total amount of electrical energy used depends on the total power used by the electrical device and the total time they are used for.
So we have been given the power of the hair dryer ![=1200\ W =\frac{1200}{1000}=1.2\ kW](https://tex.z-dn.net/?f=%3D1200%5C%20W%20%3D%5Cfrac%7B1200%7D%7B1000%7D%3D1.2%5C%20kW)
Now the time it has been use for ![=0.25\ hrs](https://tex.z-dn.net/?f=%3D0.25%5C%20hrs)
To calculate electric energy we will multiply both the terms.
Electric energy ![=0.12 \times 0.25 =0.3\ kW\ h](https://tex.z-dn.net/?f=%3D0.12%20%5Ctimes%200.25%20%3D0.3%5C%20kW%5C%20h)
So electric energy used for the hairdryer is =![0.3\ kW\ h](https://tex.z-dn.net/?f=0.3%5C%20kW%5C%20h)
Answer:
![\frac{1}{49}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B49%7D)
Step-by-step explanation:
The equation of a parabola in vertex form is
y = a(x - h)² + k
where (h, k) are the coordinates of the vertex and a is a multiplier
here (h, k) = (- 3, - 1), thus
y = a(x + 3)² - 1
To find a substitute (4, 0) into the equation
0 = 49a - 1 ( add 1 to both sides )
49a = 1 ( divide both sides by 49 )
a = ![\frac{1}{49}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B49%7D)
y =
(x + 3)² - 1
coefficient of the x² term is ![\frac{1}{49}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B49%7D)
Answer:
the area of this triangle is 7(5) which equals 35 sq cm
Step-by-step explanation:
no parallelogram shown?
Answer:
Sure, I need to practice maths anyways haha