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Veronika [31]
4 years ago
9

Chance can wash the car in 2 hours, while Sandy can wash the same car in 4 hours. How many hours would it take for them to wash

the car together?
A. 4/3
B. 3/4
C. 3
D. 4
Mathematics
1 answer:
VashaNatasha [74]4 years ago
4 0
<span>1 hour and 1/3rd of an hour
</span>
so A is right 
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The answer has to be a geometric proof. Thank you!
Mariulka [41]

Given data:

The given triangle in which AD is on perpendicular bisector on BC.

In triangle ABD and ACD.

\begin{gathered} \angle ADB=\angle\text{ADC}=90^{\circ} \\ BD=CD(\text{given)} \\ AD=AD\text{ (common)} \\ \Delta ABD\cong\Delta ACD(\text{SAS)} \end{gathered}

Simmilary triangle BED and triangle CED.

\begin{gathered} \angle BDE=\angle CDE \\ BD=CD \\ ED=ED \\ \Delta BED\cong\Delta CED(SAS) \end{gathered}

The fisr expression can be written as,

\begin{gathered} \Delta ABD\cong\Delta ACD \\ \Delta\text{ABE}+\Delta BED\cong\Delta ACE+\Delta\text{CED} \end{gathered}

Substitute CED in place of BED.

\begin{gathered} \Delta ABE+\Delta CED\cong\Delta ACE+\Delta CED \\ \Delta ABE\cong\Delta ACE \end{gathered}

Thus, the triangle ABE is congruent to trriangle ACE.

7 0
1 year ago
Which of the following is a not a rational number?<br> 1.3<br> 3.1415...<br> 5.25<br> 0.66
Aleks [24]

Answer:

Step-by-step explanation:

3.14159 is irrational because it's a repeating decimal; it cannot be expressed as the ratio of two integers.  All the others can be expressed in that way.

3 0
3 years ago
Read 2 more answers
Does anyone know this ? i need help asap !!!
Leno4ka [110]
It’s negative slope since it’s going to the left
5 0
3 years ago
Which line segment is a radius of circle F? A: AC B:ED C:FE D:DC (Circle with center at point F. Points A, B, C, D, and E are on
weqwewe [10]

Answer:

The correct option is C.

Step-by-step explanation:

It is given that the point F is the center of the circle and the points A, B, C, D, and E are on the circle.

A line segment joining any point on the circumference to the center of the circle is known as radius of the circle.

Since F is the center of the circle and the points A, B, C, D, and E are on the circle, therefore the line segments FA, FB, FC, FD and FE radius of the circle F.

So, option C is correct.

8 0
3 years ago
Read 2 more answers
I cant wrap my head around this
vazorg [7]

Answer:

B is the answer

Step-by-step explanation:

16 times 1/2 is 8.

dilations do not change angles so the angle of A will remain 28 degrees.

7 0
3 years ago
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