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3 years ago

Landen spent L hours at the beach last weekend. Matéo spent 15% fewer hours at the beach than Landen did

Mathematics

2 answers:

KatRina [158]3 years ago

6 0

Answer:

b and e

Step-by-step explanation:

khan

fenix001 [56]3 years ago

4 0

Answer: B, D, and E

0.85L

L-0.15L

L(1-0.15)

$L - \frac{15}{100}L$

$L - \frac{3}{20}L$

Step-by-step explanation:

L is the number of hours Landen spent at the beach. Mateo spent 15% less time. This means he spent 85% of it. So 0.85 times L. We can also calculate it by subtracting the difference between the two kids. - 15%. 15% is 0.15L or $\frac{15}{100}L$ . We subtract by L-0.15L or as $L - \frac{15}{100}L$ . This fraction can simplify to $L - \frac{3}{20}L$

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10. Jenna flips two pennies 105 times. How

Studentka2010 [4]

Answer:

Step-by-step explanation:

When you flip two coins, you can have 4 different outcomes:

All outcomes are equally likely, but notice that if you do not keep track of which coin is which, you will get 1/4 of the flips to be both heads, 1/4 of the flips to be both tails, and 1/2 of the flips to be one heads and one tails.

p(both heads) = 1/4

With 105 flips, the expected number of both heads is

105 * 1/4 = 26.25

Answer: 26

7 0

3 years ago

What is 20+20????I need help.

Grace [21]

Answer:

Ummm... Jeez I don't know, this is hard.

Maybe pentagon?

(Thanks btw)

8 0

3 years ago

Explain why the hypotenuses of the triangles below have the same slope.

andrew11 [14]

The hypotenuse of the two triangles have the same slope because they are in the same straight line and the slope of a straight line is constatn.

You can prove that in this way:

slope = rise / run = Δy / Δx

For the upper triangle: slope = (4 - 2) / (8 - 4) = 2 / 4 = 1 / 2

For the lower triangle: slope = (-1 - (-5)) / (- 2 - (-10)) = 4 / 8 = 1 / 2

So, this proves that the two slopes are the same: 1 / 2

3 0

4 years ago

The equation of a circle is x2 − 4x + y2 + 8y − 29 = 0. what are the center and radius of the circle? enter your answers in the

uranmaximum [27]

$\text{The standard form of the circle:}\\\\(x-h)^2+(y-k)^2=r^2\\\\\text{h and k are the x and y coordinates of the circle}$

$\text{We have}\\\\x^2-4x+y^2+8y-29=0\\\\\text{use:(*)}(a\pm b)^2=a^2\pm2ab+b^2$
$x^2-2x\cdot2+y^2+2y\cdot4=29\ \ \ |+2^2\ \ |+4^2\\\\\underbrace{x^2-2x\cdot2+2^2}_{(*)}+\underbrace{y^2+2y\cdot4+4^2}_{(*)}=29+2^2+4^2\\\\(x-2)^2+(y+4)^2=49$
$\text{Answer: the center (2;-4), the radius}\ r=\sqrt{49}=7$

3 0

3 years ago

(URGENT) need answer for today

Kipish [7]

<u>Given</u>:

Given that a triangle has side lengths 1.5 inches, 2 inches and 3 inches.

We need to determine whether the triangle is a right triangle.

<u>Right triangle:</u>

To determine whether the given triangle is a right triangle, let us use the Pythagorean theorem.

Let us assume that the given triangle is a right triangle.

Since, the value of the hypotenuse takes the largest value in the given triangle, then from the given sides, the hypotenuse is 3 inches.

The legs of the triangle are 1.5 inches and 2 inches.

Applying the Pythagorean theorem, we have;

$3^2=1.5^2+2^2$

Squaring the terms, we have;

$9=2.25+4$

$9 \neq 6.25$

Since, both sides of the equation are not equal, then the given triangle with sides 1.5 inches, 2 inches and 3 inches is not a right triangle.

Hence, our assumption is wrong.

The given triangle is not a right triangle.

3 0

3 years ago