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3 years ago

1. Which ratios form a proportion? Use equivalent ratios to test each pair.

Mathematics

2 answers:

kifflom [539]3 years ago

3 0

The first one is C. 12/16, 15/20
^ _ ^

Blizzard [7]3 years ago

3 0

Answer:Which ratios form a proportion? Use equivalent ratios to test each pair.

A. 4/9, 2/3 B. 6/15, 9/12 C. 12/16, 15/20 D. 18/ 20, 24/30 2. Which ratio forms a proportion with 20/30? Use equivalent ratios to test each ratio.

A. 16/24 B. 10/20 C. 17/51 D. 16/60 3. Which ratios form a proportion? Use cross products to test each pair.

A. 15/40, 35/90 B. 18/22, 45/55 C. 12/55, 33/121 D. 17/31, 32/45 4. Which ratios form a proportion? Use cross products to test each pair.

A. 9/17, 27/50 B. 12/35, 24/75 C. 15/55, 32/121 D. 12/35, 20/70 5. Which ratios do not form a proportion? A. 24/96, 27/108 B. 17/102, 12/70 C. 21/51, 35/85 D. 45/75, 63/105.

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the length of a soccer pitch is 20 m less than twice its width. the area of the pitch is 6000m^2. find its dimensions.

Setler79 [48]

X=width of a coccer pitch
2x-20=length of a soccer pitch
Area (rectangule)=length x width
We suggest this equation:
x(2x-20)=6000
2x²-20x=6000
2x²-20x-6000=0
x²-10x-3000=0
We solve this quadratic equation:

x=[10⁺₋√(100-4*1*-3000)]/2=[10⁺₋√(100+12000)]/2=
=(10⁺₋110)/2
we have two solutions:
x₁=(10-110)/2=-50, invalid solution.
x₂=(10+110)/2=60

x=60
2x-20=2(60)-20=120-20=100

Solution: the length is 100 m, and the width is 60 m.

To check:
Area=100 m*60 m=6000 m²
The twice of width is =2(60 m)=120 m,
20 m less than twice its width is: 120 m-20 m=100 m=the length.

8 0

3 years ago

Which statement about g(x) = x^2 - 576 is true?

Zina [86]

Answer:

The second option.

Step-by-step explanation:

Let's see if this will work.

(x+24)(x-24)

Let's open the brackets

x^2 - 24x +24x - 576

= x^2 - 576

Please give brainliest

I hope you understand. If you don't. Please, leave a comment below.

7 0

3 years ago

Help pls and thank u

valkas [14]

Answer:

V =12.167 cm^3

Step-by-step explanation:

V = s^3 is the volume of a cube where s is the side length

The side length of the cube is 2.3 cm

V = ( 2.3 cm) ^3

V =12.167 cm^3

7 0

2 years ago

Read 2 more answers

What is the factor tree of 99 and 165 and what is the GCF?

Shtirlitz [24]

99
/ \
11 9
/ \
3 3

165
/ \
33 5
/ \
3 11

GCF=3

5 0

3 years ago

Li is making beaded necklaces for each necklace, she uses 27 spacers, plus 5 beads per inch of necklace length. Write an equatio

brilliants [131]

Given that <span>Li is making beaded necklaces for each necklace, she uses 27 spacers, plus 5 beads per inch of necklace length.

The equation to find how many beads Li needs for each necklace can be obtained as follows:

A. The input variable is the number of inches of the necklace length (x).

B. The output variable is the number of beads Li needs for each necklace (y).

C. The required equation is given by

y = 5x</span>

6 0

2 years ago