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garri49 [273]
3 years ago
5

NEED HELP! Thanks!

Mathematics
1 answer:
sladkih [1.3K]3 years ago
6 0
I think the answer would be 7.5 hours or 4 hours,not so sure which one exactly

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Machine A produces bolts at a uniform rate of 120 every 40 seconds, and Machine B produces bolts at a uniform rate of 100 every
Nutka1998 [239]

Answer:

25 seconds

Step-by-step explanation:

Hi there!

In order to answer this question, first we need to know how many bolts per second are produced by each machine, this can be known by dividing the number of bolts by the time it takes.

For machine A:

A = \frac{120 bolts}{40 s}= 3 \frac{bolts}{s}

For machine B:

B = \frac{100 bolts}{20 s}= 5 \frac{bolts}{s}

So, if the two machines run simultaneously, we will have a rate of prodcution of bolts equal to the sum of both:

A+B=(3+5)\frac{bolts}{s}=8\frac{bolts}{s}

Now, we need to know how much time it will take to producee 200 bolts, to find this out we need to divide the amount of bolts by the production rate:

t = \frac{bolts}{ProductionRate}= \frac{200 bolts}{8 \frac{bolts}{s} }

The <em>bolts</em> unit cancell each other and we are left with <em>seconds</em>

t = \frac{200}{8} s = 25 s

So it will take 25 seconds to produce 200 bolts with machine A and B running simultaneously.

Greetings!

4 0
3 years ago
Read 2 more answers
The sum of a rational number and an irrational number equals.
VashaNatasha [74]

Answer:

I think D. but I'm not sure

7 0
3 years ago
Read 2 more answers
Please answer Parts A, B, and C. I Will Mark Brainliest
bogdanovich [222]
A) John: 3.75+1.45m
Kiara: 6.25+0.55m

B) (3.75+1.45m)+(6.25+0.55m)
Added: 10+2m

C) (10+2m) divide by 2
Factored: 5+m
4 0
3 years ago
Would really appreciate the help??​
erik [133]

Answer:

You would use tan(theta) = 7/5 to find the angle measure

3 0
3 years ago
A car is moving with an initial velocity of 10 mph accelerates at the rate of a(t)=2.5t mph per second for 5 seconds. How fast i
Rom4ik [11]

Answer:

The car is going up at a speed of 22.5 mph

Step-by-step explanation:

In this question, we are asked to calculate the speed of a moving car which started moving at an initial velocity for a specific period of time.

To calculate this, we use one of the basic equations of motion;

v = u + at

Where v is the final velocity, u is the initial velocity and t is the time

From the question, we can identify the parameters as follows;

v = ?

u = 10mph

a = 2.5t mph per second for 5 seconds.

Hence a here would be 2.5 * 5 = 12.5

Now, let’s put these values in the equation

v = 10 + 12.5

v = 22.5 mph

3 0
3 years ago
Read 2 more answers
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