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Nat2105 [25]
3 years ago
13

2(12x + 16y) + 5(3y +4z) + 7(6x – 3y - 2z)

Mathematics
1 answer:
Phantasy [73]3 years ago
7 0

Answer:

52x + 26y + 20z

Step-by-step explanation:

Assuming you needed the answer to be simplified!

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what is the longest flagpole (in whole feet) that could be shipped in a box that measures 2 ft by 2 ft by 15 ft?
lora16 [44]

Answer:

30

Step-by-step explanation:

7 0
4 years ago
Triangle ABD is a right-angled triangle, with ∠ABD = 90◦ . The point C lies on side BD. CD has length 20 cm. ∠CDA = 35.8 ◦ and ∠
pishuonlain [190]
The length is 46.10 cm.

Since ∠BCA = 50.5°, ∠ACD = 180-50.5 =129.5°.  This means that ∠CAD = 180-(129.5+35.8) = 14.7°.  We can now use the law of sines;

sin 14.7/20 = sin 35.8/x

Cross multiply:
x*sin 14.7 = 20*sin 35.8

Divide both sides by sin 14.7:
x = (20*sin 35.8)/(sin 14.7) = 46.10
6 0
3 years ago
Some fireworks are fired vertically into the air from the ground at an initial velocity of 24.5 meters per second. Find the high
krek1111 [17]

Answer:

The highest point reached by the firework is approximately 30.6 meters

Step-by-step explanation:

The upward velocity of the fireworks is given as 24.5 m/s

The equation of projectile motion for an object fired vertically upwards can be written as follows;

v² = u² - 2·g·s

Where;

v = The final velocity of the motion = 0 m/s at maximum height

u = The final velocity of the motion =  24.5 m/s

g = Acceleration due to gravity = 9.81 m/s²

s = The height reached = (The highest point reached by the firework)

By substituting the values, we have;

(0 m/s)² = (24.5 m/s)² - 2 × 9.81 m/s² × s

Which gives;

2 × 9.81 m/s² × s = (24.5 m/s)² = 600.25 m²/s²

19.62 m/s² × s = 600.25 m²/s²

s = 600.25 m²/s²/(19.62 m/s²) = 30.594 m ≈ 30.6 meters

The highest point reached by the firework is approximately 30.6 meters

3 0
3 years ago
The ratio of boys to girls in a group is 2:1. If there are 18 more boys than girls, work out how many girls there are.
Alborosie

Answer:

I think its 18, because if there's 2 boys to 1 girl then if there's 18 girls then there is an equivalent 18 boys to match, plus another 18, which would put the ratio of boy to girl at 2:1

Step-by-step explanation:

4 0
3 years ago
a salesperson earns a commission of $476 for selling $3400 in merchandise. what is the commission rate?
Artemon [7]

Answer:

Step-by-step explanation:

$476/($3400) = 0.14 = 14%

3 0
3 years ago
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