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nadya68 [22]
3 years ago
10

3.) AI 65 kom hr. Alfred can reach home in 50 minutes. At what speed should he drive his car

Mathematics
1 answer:
Yanka [14]3 years ago
8 0

Answer:

He should drive his car at a speed of 81.25 kilometers per hour.

Step-by-step explanation:

With a velocity of 65 kilometers per hour, he reaches home in 50 minutes. What speed he needs to reach home 10 minutes earlier, that is, in 50 - 10 = 40 minutes?

To solve this, we use the relation between inverse proportion variables(as the velocity increases, time needed decreases), that is, a rule of three with line multiplication, instead of cross. So

65 kilometers per hour - 50 minutes

x kilometers per hour - 40 minutes

So

40x = 65*50

x = \frac{65*50}{40}

x = 81.25

He should drive his car at a speed of 81.25 kilometers per hour.

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If we apply the Pythagorean Theorem to the Egyptian knots we can see that 3^2 + 4^2 = 5^23 2 +4 2 =5 2 . Which of the sets of th
pantera1 [17]

Answer:

B) { 51, 149, 140 }

C) { 16, 63, 65 }

Step-by-step explanation:

We need to choose Pythagoras theorem formula

c^2=a^2+b^2

now, we can verify each options

option-A:

a=1

b=1

c=1

now, we can verify formula

1^2=1^2+1^2

1=2

We can see that left side is not equal to right side

so, this is FALSE

option-B

a=51

b=140

c=149

now, we can verify formula

149^2=51^2+140^2

22201=22201

We can see that left side is  equal to right side

so, this is TRUE

option-C

a=16

b=63

c=65

now, we can verify formula

65^2=16^2+63^2

4225=4225

We can see that left side is  equal to right side

so, this is TRUE

option-D:

a=6

b=8

c=11

now, we can verify formula

11^2=6^2+8^2

121=100

We can see that left side is not  equal to right side

so, this is FALSE

3 0
3 years ago
Read 2 more answers
The price of a pie is now $11. how many pies are sold? how many pies does each producer make? how many producers are there? how
Anettt [7]
Is there suppose to be a link or something more to this question?
3 0
3 years ago
1. The area of a circle is 60 square units. What is the area of ...
amid [387]

Answer:

30

Step-by-step explanation:

60=whole

60/2=30

8 0
3 years ago
Consider the initial value problem:
Inessa [10]

Answer:

\left \{ {{u'=v} \atop {v'=5v-6u-5\sin(2t)}} \right. \\u(0)=-5;u'(0)=2

Step-by-step explanation:

The given initial value problem is;

y''-5y'+6y=-5\sin(2t)---(1)\\y(0)=-5,y'(0)=2

Let

u(t)=y(t)----(2)\\v(t)=y'(t)----(3)

Differentiating both sides of equation (1) with respect to t, we obtain:

u'(t)=y'(t)---(4)\\ \\\implies u'(t)=v(t)---(5)

Differentiating both sides of equation (2) with respect to t gives:

v'(t)=y''(t)----(6)

From equation (1),

y''=5y'-6y-5\sin(2t)\\y''=5v(t)-6u(t)-5\sin(2t)\\\implies v'(t)=5v(t)-6u(t)-5\sin(2t)----(7)

Putting t=0 into equation (2) yields

u(0)=y(0)\\\implies u(0)=-5

Also putting t=0 into equation (3)

u'(0)=y'(0)\\u'(0)=2

The system of first order equations is:

\left \{ {{u'=v} \atop {v'=5v-6u-5\sin(2t)}} \right. \\u(0)=-5;u'(0)=2

3 0
4 years ago
Solve this problem please!!
zavuch27 [327]

if I know how to do this I this it's y27 oh I know I wrong But it was worth a try right

Step-by-step explanation:

idffffk

7 0
3 years ago
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