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3 years ago

I really need the answer

Mathematics

1 answer:

Airida [17]3 years ago

6 0

Answer:

232

Step-by-step explanation:

all u gotta do here is plug in 40 here so:

0.145(40)x^2

0.145(1600)

f(x)= 232

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Slope: 1.5, y-intercept: -1

madreJ [45]

Option 1 is the correct answer

3 0

3 years ago

Xue Ying had 143 more sweets than Joanne.After Joanne gave away 22 sweets, Xue Ying had 6 times as many sweets as Joanne. How ma

andreyandreev [35.5K]

Answer:

In the end Joanne had 55 sweets.

Step-by-step explanation:

Let the number of sweets that Xue Ying had be y and let the number of sweets Joanne had be x.

It is given that Xue Ying had 143 more sweets than Joanne. We can write this information as an equation.

y = x + 143.

It is also given that Joanne gave away 22 of her sweets and after that Xue Ying had 6 times as many more sweets. We can write this as an equation.

y = 6(x - 22) = 6x - 132.

Therefore we can equate the two equations and solve for x.

x + 143 = 6x - 132

5x = 275

∴ x = $\frac{275}{5} = 55$ sweets.

Therefore in the end Joanne had 55 sweets.

4 0

3 years ago

Find y Round to the nearest tenth: 28° X 350 ft y y = [ ? ]ft Enter

NeTakaya

Answer:

y = 658.3 ft

Step-by-step explanation:

Angle of depression = angle of elevation = 28° (alternate angles are congruent)

Reference angle = 28°

Side length opposite to reference angle = 350 ft

Adjacent = y

Apply trigonometric function, TOA:

Tan 28 = Opp/Adj

Tan 28 = 350/y

y*Tan 28 = 350

y = 350/Tan 28

y = 658.254263 ≈ 658.3 ft (nearest tenth)

7 0

3 years ago

A teacher uses 56 pencils and 80 pieces of paper to make student supply kits for each student in her small group.

Contact [7]

Answer:

All you have to do is multiply 56x80 and then you get the right answer which is 4480

7 0

3 years ago

Given that

lbvjy [14]

Answer:

$x=3\sqrt{2}$

Step-by-step explanation:

In a right triangle, the "hypotenuse" is the side opposite of the 90 degree angle. That side is "a"

Using pythagorean theorem, we can write:

Leg^2 + Leg^2 = Hypotenuse^2

Note: legs are the other 2 sides, x and x respectively

Now we can write:

$x^2 + x^2 = a^2$

a is 6 meters, so replacing a with 6 and solving we get:

$x^2 + x^2 = a^2\\2x^2=6^2\\2x^2=36\\x^2=18\\x=\sqrt{18}$

To simplify the surd, we can use the property shown below:

$\sqrt{x*y}=\sqrt{x} \sqrt{y}$

Also

$\sqrt{x} \sqrt{x} =x$

Now simplifying:

$x=\sqrt{18} \\x=\sqrt{9*2}\\ x=\sqrt{9} \sqrt{2} \\x=3\sqrt{2}$

4 0

3 years ago