Calculate the area of a right-angled triangle of sides 30 cm, 40 cm, 50 cm.

Mathematics

1 answer:

grin007 [14]3 years ago

5 0

The correct answer is 60cm^2 because the area of a triangle is half base*height -> 30/2*40

You might be interested in

Lee watches TV for 2 hours per day. During that time, the TV consumes 250 watts per hour. Electricity costs (10 cents)/(1 kilowa

vladimir1956 [14]

Answer:

$1.5

Step-by-step explanation:

Lets us first calculate energy consumed by TV in 30 days.

Energy consumed by TV in one hour : 250 watts.

TV operated 2 hours a day

so energy consumer by TV in a day = 250 * 2 watts = 500 watts hour

Energy consumed by TV in 30 day = energy consumer by TV in a day * 30

= 500*30 watts = 15,000 watt-hour

Convert total energy consumed in kilo watt hour

we know that one kilowatt hour = 1000 watt-hour

Thus, 15,000 watt-hour = 15,000/1000 kilowatt-hour = 15 kilowatt-hour

________________________________

cost of electricity = 10 cents per kilowatt-hour

cost of electricity for 15 kilowatt-hour = 15* cost of electricity for one kilowatt-hour( which is 10 cents)

=>15*10 = 150 cents

As $1 = 100 cents

hence 150 cents = $150/100 = $1.5 .

Thus, it cost $1.5 to to operate for a month of 30 days.

6 0

3 years ago

Put 0.875 in a fraction form

KATRIN_1 [288]

I think the answer is 7/8

4 0

3 years ago

Read 2 more answers

Francois baked just enough cookies to fill all the orders at his bakery. While the cookies were cooling, a kitchen assistant kno

Dmitrij [34]

12/100x=36
=> x=36*100/12
=> x = 300

7 0

3 years ago

Solve the inequality.<br> -6n > 54

Vika [28.1K]

Answer:

n < 9

Step-by-step explanation:

Solving an inequality is just like solving an equation, one uses inverse operations. The only difference is that when one multiplies or divides by a negative number, one must remember to flip the inequality sign to ensure that the expression remains true.

$-6 n > 54$