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3 years ago

Which shows the numbers 3/7, 5/21, and 0.87 in order from greatest to least?

Mathematics

1 answer:

kipiarov [429]3 years ago

6 0

Answer:

0.87 ,3/7, 5/21

Step-by-step explanation:

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Triangle ABC has a height of 8 cm and an area of 42cm². <br> Calculate the length of BC.

Tcecarenko [31]

BC must be base

Height=8cm
Area=42cm^2

We know

$\boxed{\sf Area_{(Triangle)}=\dfrac{1}{2} Height\times Base}$

$\\ \sf\longmapsto 42=\dfrac{1}{2}8BC$

$\\ \sf\longmapsto 4BC=42$

$\\ \sf\longmapsto BC=\dfrac{42}{4}$

$\\ \sf\longmapsto BC=10.5cm$

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3 years ago

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-9x+9>36<br><br> I need the number line for the equation

dolphi86 [110]

The answer is c. because the circle doesn’t need to be shaded in since it’s just >.

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3 years ago

A bag contains two red marbles and three blue marbles. You randomly pick a marble. Find the number of possible outcomes in the s

Oksana_A [137]

Answer: 2 possible outcomes

Step-by-step explanation:

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3 years ago

2) What is the value of x? *<br> 15.5<br> 25.5<br> 31<br> 47

Artyom0805 [142]

Step-by-step explanation:

2∠BDA = ∠BCA

2 (3x - 15)° = (2x + 32)°

6x - 30 = 2x + 32

6x - 2x = 32 + 30

4x = 62

x = 62/4

x = 15.5

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3 years ago

3. Diego drew a scaled version of a Polygon P and labeled it Q.

bogdanovich [222]

Answer:

The scale factor used to go from P to Q is 1/4

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z ----> the scale factor

x -----> area of polygon Q

y -----> area of polygon P

$z^{2}=\frac{x}{y}$

we have

$y=72\ units^2$

Find the area of polygon Q

Divide the the area of polygon Q in two triangles and three squares

The area of the polygon Q is equal to the area of two triangles plus the area of three squares

see the attached figure N 2

Find the area of triangle 1

$A=(1/2)(1)(2)=1\ units^2$

Find the area of three squares (A2,A3 and A4)

$A=3(1)^2=3\ units^2$

Find the area of triangle 5

$A=(1/2)(1)(1)=0.5\ units^2$

The area of polygon Q is

$x=1+3+0.5=4.5\ units^2$

Find the scale factor

$z^{2}=\frac{x}{y}$

we have $y=72\ units^2$

$x=4.5\ units^2$

substitute and solve for z

$z^{2}=\frac{4.5}{72}$

$z^{2}=\frac{1}{16}$

square root both sides

$z=\frac{1}{4}$

therefore

The scale factor used to go from P to Q is 1/4

6 0

3 years ago