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3 years ago

Greg is riding his bicycle. He rides

2 answers:

8 0

Just divide to calculate his speed in km/h.

38.4 / 6 = 6.4 km/h

So Greg rides his bicycle at a speed of 6.4 kilometers per hour.

Sauron [17]3 years ago

3 0

6.4 kilometers an hour<span />

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Hi my sister needs help with this

True [87]

Answer:

Step-by-step explanation:

Book A: Mass is 1000 g + 700g + 10 g, or 1720 g.

Book B: Mass is 1500 g + 100 + 80, or 1680 g.

Book A has the greater mass: 1720 g versus 1680 g.

The difference in mass is 1720 g - 1680 g, or 40 g

6 0

4 years ago

In triangle $DEF,$ $\angle D = 30^\circ,$ $\angle F = 60^\circ,$ and $EF = 6.$ Find $DE + DF.$ [asy] unitsize(2 cm); pair D, E,

lesya692 [45]

Answer:

The answer is below

Step-by-step explanation:

In triangle DEF, ∠D = 30°, ∠F = 60° and EF = 6. Find DE + DF.

Solution:

A triangle is a polygon with three sides. There are different types of triangles such as isosceles triangle, scalene triangle equilateral triangle, right angled triangle.

In triangle DEF:

∠D + ∠E + ∠F = 180° (sum of angles in a triangle)

30 + ∠E + 60 = 180

∠E + 90 = 180

∠E = 180 - 90

∠E = 90°

This is a right angled triangle since one angle = 90° (∠E).

Using sine rule:

$\frac{|EF|}{sin(D)}=\frac{|DE|}{sin(F)} \\\\\frac{6}{sin(30)}=\frac{|DE|}{sin(60)} \\\\|DE|=10.39\\\\\frac{|EF|}{sin(D)}=\frac{|DF|}{sin(E)} \\\\\frac{6}{sin(30)}=\frac{|DF|}{sin(90)} \\\\|DF|=12\\\\$

Hence DE + DF = 12 + 10.39 = 22.39

6 0

3 years ago

What set of transformations could be applied to rectangle ABCD to create A″B″C″D″? 'Rectangle formed by ordered pairs A at negat

CaHeK987 [17]

Answer:

Reflection over the y-axis and rotation of 180°

Step-by-step explanation:

We have,

Rectangle ABCD with co-ordinates A(-4,2), B(-4,1), C(-1,1) and D(-1,2).

It is transformed to a new rectangle A'B'C'D' with co-ordinates A'(-4,-2), B'(-4,-1), C'(-1,-1) and D'(-1,-2).

The graph of both the triangles is shown below.

we see that,

The rectangle ABCD is reflected about y-axis and then rotated 180° to obtain A'B'C'D'.

Reflected about y-axis Rotation of 180°

A= (-4,2) (4,2) A'= (-4,-2)

B= (-4,1) (4,1) B'= (-4,-1)

C= (-1,1) (1,1) C'= (-1,-1)

D= (-1,2) (1,2) D'= (-1,-2)

Hence, the second rectangle is formed by: Reflection over the y-axis and rotation of 180°.

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3 years ago

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Please help me thank you

Dafna11 [192]

Answer:

The missing number is 30

Step-by-step explanation:

When you look at the chart and see that it starts at 6 and then goes to 12,18, and 24 you are simply adding 6 each time to get the next number.

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3 years ago

Wanda has 4 crayons. 2 are eaten by a hippopotamus. How many crayons will Wanda have

krok68 [10]

Wanda has 2 crayons.

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3 years ago

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