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3 years ago

Triangle ABC has the following vertices:

Mathematics

2 answers:

koban [17]3 years ago

4 0

Answer:

Yes because AB ⊥ BC

Step-by-step explanation:

Komok [63]3 years ago

3 0

Answer: Yes because AB ⊥ BC

Step-by-step explanation: Khan Academy

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Karo-lina-s [1.5K]

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3 years ago

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Dina and Masha started out on a 10 km bike path at the same time. When Dina reached the end of the 10 km, Masha still had 2 km t

german

Answer:

4 km/h

Step-by-step explanation:

We are told that Dina and Masha started out on a 10 km bike path at the same time.

Dina's biking speed is 5 km/h.

Let us find taken by Dina to cover 10 kn distance.

$\text{Time}=\frac{\text{Distance}}{\text{Speed}}$

$\text{Time taken by Dina to cover 10 km}=\frac{10km}{5\frac{km}{hr}}$

$\text{Time taken by Dina to cover 10 km}=\frac{10km}{5}\times \frac{hr}{km}}$

$\text{Time taken by Dina to cover 10 km}=2hr$

Therefore, Dina took 2 hours to complete 10 km.

Since both started at the same time, therefore, Masha also took 2 hours to complete 2 km less than Dina.

Let us find distance covered by Masha.

$\text{Distance covered by Masha}=10\text{ km}-2\text{ km}=8\text{ km}$

Now let us find Masha's biking speed.

$\text{Speed}=\frac{\text{Distance}}{\text{Time}}$

$\text{Masha's biking speed}=\frac{8\text{ km}}{2\text{ hour}}$

$\text{Masha's biking speed}=4\frac{\text{ km}}{\text{ hour}}$

Therefore, Masha's biking speed is 4 km per hour.

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4 years ago

Please help me!..!.!!..!.!!.

Lemur [1.5K]

It is 9/16 because 2 1/4 equals 9/4 and 9/4x1/4 equals 9/16

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3 years ago

Solve for b. 3-2(b-2)=2-7b PLEASE ANSWER QUICKLY!

Rufina [12.5K]

3b-6-2b+4=2-7b
b-2=2-7b
8b=4
b=4/8
b=1/2

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