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3 years ago

ASAP WILL GIVE BRAINLIEST

Mathematics

1 answer:

faltersainse [42]3 years ago

8 0

Answer:

480 Elk (including sampled elk) are infected

Step-by-step explanation:

8000(3/50)=480

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Jamal runs for a track team. He ran 2.1 miles in 1/3 of an hour. What is Jamal's rate of speed?

kow [346]

Answer:

6.3

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Two cars start out together from the same place. they travel in opposite directions, with one of them traveling 5 miles per hou

Mashutka [201]

<u>Annotation</u>
General formula for distance-time-velocity relationship is as following
d = v × t
The velocity of the first car will be v₁, the time is 2 hours, the distance will be d₁.
The velocity of the second car will be v₂, the time is 2 hours, the distance will be d₂.

One of them traveling 5 miles per hour faster than the others. That means the velocity of the first car is 5 miles per hour more than the velocity of the second car.
v₁ = v₂ + 5 (first equation)

The distance of the two cars after two hours will be 262 miles apart. Because they go to opposite direction, we could write it as below.
d₁ + d₂ = 262 (second equation)

Plug the d-v-t relationship to the second equation
d₁ + d₂ = 262
v₁ × t + v₂ × t = 262
v₁ × 2 + v₂ × 2 = 262
2v₁ + 2v₂ = 262

Plug the v₁ as (v₂+5) from the first equation
2v₁ + 2v₂ = 262
2(v₂ + 5) + 2v₂ = 262
2v₂ + 10 + 2v₂ = 262
4v₂ + 10 = 262
4v₂ = 252
v₂ = 252/4
v₂ = 63
The second car is 63 mph fast.

Find the velocity of the first car, use the first equation
v₁ = v₂ + 5
v₁ = 63 + 5
v₁ = 68
The first car is 68 mph fast.

Answer
$\boxed{\boxed{ v_{1}=68mph} }$
$\boxed{\boxed{ v_{2}=63mph} }$

7 0

4 years ago

Brianne solved a quadratic equation. Her work is shown below, with Step 2 missing.

Alja [10]

Given:

The given quadratic equation is

$3(x+4)^{2} = 48$

or, $(x+4)^{2} =16$

And

The roots are given: $x = -8 , x = 0$

To find the missing step.

Let us solve the equation.

$3(x+4)^{2} = 48$

or, $(x+4)^{2} = 16$

or, $x^{2} +8x+16 = 16$ [ eliminating 16 from both the side]

or, $x^{2} +8x = 0$

or, $x(x+8) = 0$

or, $x = 0, x = -8$

Hence,

The step 2 could be $x^{2} +8x = 0$

6 0

4 years ago

Read 2 more answers

Can someone tell me the right answer to this question pls and thank you

g100num [7]

I'm almost certain its D Tell me if i'm wrong

4 0

4 years ago

It was Robin's birthday and she knew she was going to have a good day. She was driving to work, and when she turned on the radio

Andreas93 [3]

Answer:

1.Random circumstance: Color of traffic light when Robin approaches the main intersection. Possible outcomes: Traffic light is green when Robin arrives, or Traffic light is not green when Robin arrives.

2.Random circumstance: Song on the radio when first turned on. Possible outcomes: Robin's favorite song is playing, or Robin's favorite song is not playing.

4.Random circumstance: Nearest available parking space. Possible outcomes: Robin finds an empty parking space in front of the building, or Robin does not find an empty parking space in front of the building.

Step-by-step explanation:

A random circumstance is one whose outcome cannot be predicted because we either do not have the full details of the matter or it has not been confirmed yet by a reliable source. In the short description of events provided above;

1.The color of the traffic light is unpredictable because it is not under the control of the drivers but is automated.

2. Robin's favorite song playing on the radio is a random circumstance because she has no control over what song is played. So, she might as well have tuned in and it would be her least favorite song playing.

3. Robin driving into the office and finding the parking space empty is a random circumstance because it is not predictable. She might have come in and found the entire space filled.

7 0

3 years ago