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2 years ago

Not sure how to go at this at all, please help.

Mathematics

2 answers:

ss7ja [257]2 years ago

8 0

Here ya go answer down below

AleksAgata [21]2 years ago

3 0

Step-by-step explanation:

Substitution means to substitute a variable with the other variable in the equation.

Like, in this equation, y = -5x.

Substituting it in the equation y = 2x - 14, we get,

=> -5x = 2x - 14

=> -7x = -14

=> 7x = 14

=> x = 2

Now, putting value of x in y = -5x, we get,

y = -5 (2) = -10

Hope it helps.

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A coin is tossed three times the probability of zero heads is 1/8 what is the probability that all three tosses result in the sa

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10 percent hope it helps

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3 years ago

A bucket that weighs 6 lb and a rope of negligible weight are used to draw water from a well that is 80 ft deep. The bucket is f

zaharov [31]

Answer:

3200 ft-lb

Step-by-step explanation:

To answer this question, we need to find the force applied by the rope on the bucket at time $t$

At $t=0, the weight of the bucket is 6+36=42 \mathrm{lb}$

After $t$ seconds, the weight of the bucket is $42-0.15 t \mathrm{lb}$

Since the acceleration of the bucket is the force on the bucket by the rope is equal to the weight of the bucket.

If the upward direction is positive, the displacement after $t$ seconds is $x=1.5 t$

Since the well is 80 ft deep, the time to pull out the bucket is $\frac{80}{2}=40 \mathrm{~s}$

We are now ready to calculate the work done by the rope on the bucket.

Since the displacement and the force are in the same direction, we can write

$W=\int_{t=0}^{t=36} F d x$

Use $x=1.5 t$ and $F=42-0.15 t$

$W=\int_{0}^{36}(42-0.15 t)(1.5 d t)$

$=\int_{0}^{36} 63-0.225 t d t$

$=63 \cdot 36-0.2 \cdot 36^{2}-0=3200 \mathrm{ft} \cdot \mathrm{lb}$

$=\left[63 t-0.2 t^{2}\right]_{0}^{36}$

$W=3200 \mathrm{ft} \cdot \mathrm{lb}$

4 0

2 years ago

In circle O, ST is a diameter.

Andreas93 [3]

The value of x must be 25.0. The correct option is the second option- 25.0

<h3>Solving Linear equations </h3>

From the question, we are to determine the value of x

From the given diagram, we can write that

m ∠SOR + m ∠UOR + m ∠TOU = 180° (Sum of angles on a straight line)

∴ (2x +8)° + (3x - 14)° + (3x -14)° = 180°

2x° + 8° + 3x° -14° + 3x° -14° = 180°

Collect like terms

2x° + 3x° + 3x° + 8° - 14° -14° = 180°

8x° -20° = 180°

8x° = 180° + 20°

8x° = 200°

x = 200/8

x = 25.0

Hence, the value of x must be 25.0. The correct option is the second option- 25.0

Learn more Solving linear equations here: brainly.com/question/1413277

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8 0

2 years ago

Read 2 more answers

The mayor of a small city has proposed that a gambling casino be built in the downtown area, arguing that the construction proje

madam [21]

This shows that only 31 out of 183 are in favor of the casino.
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3 years ago

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Answer:

After 5 minutes Kaitlyn have to mow 5,250 square feet of lawn.

Step-by-step explanation:

We are given the following in the question:

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Rate of mowing lawn = 75 square feet each minute

Area of lawn mowed in 5 minutes =

$=\text{Rate of mowing lawn}\times \text{Time}\\=75\times 5\\=375\text{ square feet}$

Square feet does Kaitlyn still have to mow after 5 minutes

$=\text{Area of lawn - Area of lawn mowed in 5 minutes}\\=5625-375\\=5250\text{ square feet}$

Thus, after 5 minutes Kaitlyn have to mow 5,250 square feet of lawn.

5 0

3 years ago