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MrRa [10]
2 years ago
14

In the Cartesian coordinate system, the x-akis is horizontal. A.True B. False

Mathematics
1 answer:
Eddi Din [679]2 years ago
8 0

Answer:

<h2>A. True</h2>

Step-by-step explanation:

<h3>In the Cartesian coordinate system, the x-axis is the horizontal line while y-axis is the parallel line.</h3><h3 />

\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}

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A motorboat travels 165 kilometers in 3 hours going upstream and 510 kilometers in 6 hours going downstream. What is the rate of
nikitadnepr [17]
<h3>Rate of the boat in still water is 70 km/hr and rate of the current is 15 km/hr</h3><h3><u>Solution:</u></h3>

Given that,

A motorboat travels 165 kilometers in 3 hours going upstream and 510 kilometers in 6 hours going downstream

Therefore,

Upstream distance = 165 km

Upstream time = 3 hours

<h3><u>Find upstream speed:</u></h3>

speed = \frac{distance}{time}\\\\speed = \frac{165}{3}\\\\speed = 55

Thus upstream speed is 55 km per hour

Downstream distance = 510 km

Downstream time = 6 hours

<h3><u>Find downstream speed:</u></h3>

speed = \frac{510}{6}\\\\speed = 85

Thus downstream speed is 85 km per hour

<em><u>If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then</u></em>

Speed downstream = u + v km/hr

Speed upstream = u - v km/hr

Therefore,

u + v = 85 ----- eqn 1

u - v = 55 ----- eqn 2

Solve both

Add them

u + v + u - v = 85 + 55

2u = 140

u = 70

<em><u>Substitute u = 70 in eqn 1</u></em>

70 + v = 85

v = 85 - 70

v = 15

Thus rate of the boat in still water is 70 km/hr and rate of the current is 15 km/hr

3 0
3 years ago
How many 3/8-foot pieces of wood can you cut from a board that is 1 7/8 feet long?
EleoNora [17]
The answer is; five pieces of wood. 

<em>Hope this helped! :)</em>
5 0
3 years ago
Read 2 more answers
Please help me I need help with my test review I can’t figure out m&lt;1 and m&lt;2
aksik [14]

Answer:

m1=12 and m2=168

Step-by-step explanation:

m1 + m2 = 180 \: (straight \: angle) \\ then \\ x - 12 + 7x = 180 \\ 8x - 12 = 180 \\ 8x = 180  +  12 = 192 \\ x = 192\div 8 \\ x = 24\\ hence \\ m1 = 24 - 12 = 12 \\ m2 = 7 \times 24 = 168.

6 0
3 years ago
Find the slope of 2,4 and 14-2
Zina [86]
It would be negative 2
7 0
3 years ago
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I will give bralienst
uysha [10]

Answer:

support: 25%*100 > 10%*50

refute: 25%*50 < 10%*200

Step-by-step explanation:

0.25*100=25 > 0.10*50=5

0.25*50=12.5 < 0.10*200=20

4 0
3 years ago
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