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Aleonysh [2.5K]
3 years ago
8

Which is faster, 20 miles in 1/2 hour or 30 miles in 3/4 hour?

Mathematics
2 answers:
Irina18 [472]3 years ago
7 0

Answer:

there both going at the same rate

Step-by-step explanation:

10 miles -1/4 hour

20 miles - 2/4 =1/2

30 miles - 3/4

topjm [15]3 years ago
5 0
30 miles in 3/4 hours is faster.

Explanation:

20 times 1/2 is 10

Proof:

20=20/1

20/1x1/2=20/2
20/2=10

30 miles in 3/4 hour is 22 1/2

Proof:

30/1x3/4=90/4
90/4=22 2/4
22 2/4=22 1/2

Brainliest my answer if it helps you out?
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Which Trig. Function do you use to find X?
zvonat [6]

Answer:

Cosine

Step-by-step explanation:

Cosine = \frac{adjacent}{hypothenuse}

Cos 70 = \frac{x}{8}

0.633 = \frac{x}{8}

0.633 x 8 = \frac{x}{8} x 8

5.064 = x

7 0
3 years ago
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Given the equation P = 2w + 2l solve for w. A) 2w = P - 2l B) w = 2l + P 2 C) w = P -2l 2 D) w = 2l - P 2
Artist 52 [7]
w = - 1\frac{P}{2}



Hope that helps, Good luck!
5 0
3 years ago
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Tower one, a cube with a hexagonal prism measures 15.6cm. Tower two, a cube with a cylinder measures 18.3cm. Tower 3, a hexagona
lina2011 [118]

Answer:

Tower 4 = 23.9cm

Step-by-step explanation:

Given

Tower one = 15.6 cm

Tower two = 18.3 cm

Tower 3 = 13.9 cm.

Required:

Height of the 4th tower

Represent a cube by X; a cylinder by Y and a hexagonal prism by Z

Tower one, a cube with a hexagonal prism = X + Z = 15.6

Tower two, a cube with a cylinder = X + Y = 18.3

Tower 3, a hexagonal prism with a cylinder = Z + Y = 13.9

X + Z = 15.6 ----- Equation 1

X + Y = 18.3 ----- Equation 2

Z + Y = 13.9 ----- Equation 3

Subtract equation 1 from 2

(X + Y = 18.3) - (X + Z = 15.6)

X - X + Y - Z = 18.3 -15.6

Y - Z = 18.3 -15.6

Y - Z = 2.7 ---- Equation 4

Add Equation 4 to Equation 3

(Y - Z = 2.7) + (Z + Y = 13.9)

Y + Y - Z + Z = 2.7+ 13.9

2Y  = 2.7+ 13.9

2Y  = 16.6

Divide both sides by 2

\frac{2Y}{2}  = \frac{16.6}{2}

Y  = \frac{16.6}{2}

Y  = 8.3cm

Substitute Y  = 8.3cm in Equation 2 and 3

X + Y = 18.3 ----- Equation 2

X + 8.3 = 18.3

Subtract 8.3 from both sides

X + 8.3 - 8.3 = 18.3 - 8.3

X = 18.3 - 8.3

X = 10cm

Z + Y = 13.9 ----- Equation 3

Z + 8.3 = 13.9

Subtract 8.3 from both sides

Z + 8.3 - 8.3 = 13.9 - 8.3

Z = 13.9 - 8.3

Z = 5.6cm

So, we have that

X = 10cm

Y  = 8.3cm

Z = 5.6cm

The question states that the 4th tower is made up of the three shapes;

This implies that;

Tower 4 = X + Y + Z

Tower 4 = 10cm + 8.3cm + 5.6cm

Tower 4 = 23.9cm

The height of the 4th tower is 23.9cm

8 0
3 years ago
Solve by elimination <br><br>-8x+8y=19<br><br>-4x+4y=8
Harrizon [31]

Answer: the first one :x=y+ −19 /8

the second one:  x=y−2

Step-by-step explanation:

6 0
3 years ago
Yesterday, Janie walked 3/5 mile to a friend’s house, 1/4 mile to the store, and 3/8 mile to another friend’s house. Which is th
Snezhnost [94]

Answer:

Answer is ten miles

3 0
3 years ago
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