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3 years ago

Please help me with D, will give you a thanks and make you brainliest if it's the right answer ! :)

Mathematics

1 answer:

choli [55]3 years ago

5 0

You can determine that the graph of 4x - 15y = 13 will pass through the coordinate point by plugging the ordered pair into the equation. If the equation makes sense, then the graph does pass through that point.

So, using the x and y values you found in C:
4(7) - 15(1) = 13
28 - 15 = 13
13 = 13
The coordinate point does fall on the graph

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Two trains start from Fort Worth traveling at the same speed. The trip for Train W takes 20 hours, while the trip for Train Z ta

MrMuchimi

Answer:

The equation that best models this situation is :

b. $\frac{x}{20}=\frac{x+400}{25}$

Distance traveled by Train W = 1600 miles

Distance traveled by Train Z = 2,000 miles

Step-by-step explanation:

Given:

Time taken for Train W to complete a trip = 20 hours

Time taken for Train Z to complete a trip = 25 hours

The city Train Z is traveling to is 400 miles farther away than the city Train W is traveling to.

both trains have same speeds and start from same location.

To find the distance in total each train travels.

Solution:

<em>Let length of the trip of Train W be </em>= $x$ miles

Speed of Train W can be given as :

⇒ $\frac{Distance}{Time}$

⇒ $\frac{x}{20}\ miles/h$

<em>So, the length of the trip of Train Z will be</em> = $(x+400)$ miles

Speed of Train Z can be given as :

⇒ $\frac{Distance}{Time}$

⇒ $\frac{x+400}{25}\ miles/h$

Since the speeds are same, so the equation to find $x$ can be given as:

⇒ $\frac{x}{20}=\frac{x+400}{25}$

Solving for $x$

Multiplying both sides by 100 to remove fractions.

⇒ $100\times \frac{x}{20}=100\times \frac{x+400}{25}$

⇒ $5x=4(x+400)$

Using distribution.

⇒ $5x=4x+1600$

Subtracting both sides by $4x$

⇒ $5x-4x=4x-4x+1600$

⇒ $x=1600$

Thus, Distance traveled by Train W = 1600 miles

Distance traveled by Train Z = $1600+400$ = 2,000 miles

3 0

3 years ago

Please help with the questions below

Julli [10]

Answer:

i) 4620

ii) 756

Note: to check whether answer is correct, take LCM of answer.

e.g. the answer for the first part is 4620, so once you take LCM of that, the answer should be 3³ × 7 × 2² in its index notation.

Step-by-step explanation:

840 = 2³ × 3 × 5 × 7. 8316 = 2² × 3³ × × 7 × 11

840 = 2³ × 3 × 5 × 7

8316 = 2² × 3³ × × 7 × 11

i) The greatest while number that will divide both 840 and 8316 exactly.

Ans: 2² × 3 × 5 × 7 × 11

= 4620

ii) The smallest whole number that is divisible by both 840 and 8316.

Ans: 2² × 3³ × 7

= 756

HOPE THIS HELPS. TAKE CARE! BYE

3 0

3 years ago

PLZ HELP ME UNDERSTAND MY OTHER QUESTIONS SIMILAR TO THIS ONE BETTER!

Katyanochek1 [597]

The answer would be C. 15:27. This is because there are 15 geese in the pond, and 27 birds in the pond in total because 15 + 12 = 27. The ratio means that for every 15 geese, there are 27 total birds in the pond. I hope this helps! Let me know if you're still a bit confused :)

8 0

3 years ago

How to convert 64 mm to fraction

natulia [17]

1m= 1000mm

so 64mm*1m/1000mm=64/1000m

7 0

3 years ago

Read 2 more answers

Pls help asap no trolls!!

wlad13 [49]

Answer:

The answer to this is SAS

8 0

3 years ago