1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Brums [2.3K]
4 years ago
9

If John drove 210 miles in 3 hours, how far will he have driven in 4.5 hours?

Mathematics
1 answer:
VashaNatasha [74]4 years ago
3 0

Answer:

3hours and 15 mins

Step-by-step explanation:

210 divied by 3=70

70=per hour

4 hours=280

70 divied by 2= 35

.5=35

280+35=315

315 miles in 4.5 hours

You might be interested in
A machine fills boxes with cereal. The boxes are labeled as containing 24 ounces but there is some variability; the amount depos
m_a_m_a [10]

Answer:

The mean amount of cereal in a box must be 23.42 ounces.

Step-by-step explanation:

Let <em>X</em> = amount of cereal in a box.

It is provided that <em>X</em> follows a normal distribution with mean <em>μ</em> and standard deviation <em>σ</em> = 0.25.

If 99% of the boxes contain 24 ounces or more of cereals then the probability statement is:

\geq P(X \geq 24) = 0.99\\P(\frac{X-\mu}{\sigma}\geq  \frac{24-\mu}{0.25})=0.99\\P(Z \geq z)=0.99\\1-P(Z

Use the <em>z</em> table to determine the <em>z-</em>value.

The value of <em>z</em> is -2.33.

Determine the value of <em>μ</em> as follows:

\frac{24-\mu}{0.25}=-2.33 \\\mu=24-(2.33\times 0.25)\\=23.4175\\\approx23.42

Thus, the mean amount of cereal in a box must be 23.42 ounces.

7 0
4 years ago
What are the roots of the function?<br> f(x) =x^2 + 2x – 80
Andrej [43]

Answer:

x^2+2x-8= x^2+10x-8x-80 =x(x+10)-8(x+10)

=( x-8) (x+10)

therefore x= 8 or x=-10

7 0
3 years ago
Please help solve for RN
sp2606 [1]

Answer:

I guess...

Step-by-step explanation:

Since QR and PN are parallels, I think what happens in MN and MP is proportional, so:

RN = x

8 is to 10 as

5 is to x

8 * x = 5 * 10

8x = 50

x = 50 / 8

x = 6.25

RN = 6.25

4 0
2 years ago
Closing prices of two stocks are recorded for 50 trading days. The sample standard deviation of stock X is 4.665 and the sample
Vedmedyk [2.9K]

Answer:

0.9113

Step-by-step explanation:

Given :

Sample standard deviation of Stock X = 4.665

Sample standard deviation of Stock Y = 8.427

Sample Covariance = 35.826

The Correlation Coefficient, R is related to sample covariance and standard deviation using the formular :

R = Covariance(X, Y) / (SD(X) * (SD(Y))

R = 35.826 / (4.665 * 8.427)

R = 35.826 / 39.311955

R = 0.9113

Hence, correlation Coefficient, R = 0.9113 which depicts a strong positive relationship.

6 0
3 years ago
-3x+10y=-20 <br> -8x+2y=11 elimination method
Semenov [28]
(-75/37, -193/74) is your answer .-.
5 0
3 years ago
Other questions:
  • Help please! 1/2x + 3 &lt; 4x - 7 ANSWERS ARE BELOW
    9·1 answer
  • What is bigger 4
    11·2 answers
  • If f(x) = 2x^2 and g(x)= x^2 + 2x, which expression represents f(g(x))?
    5·1 answer
  • Write the number 208000478 in expanded form
    14·2 answers
  • How many significant figures does 0.0560
    15·2 answers
  • Evaluate the function requested. Write your answer as a fraction in lowest terms. Find Tan A
    10·2 answers
  • Carlos walked to school on 14 of the 20 school days in February. Which value is equivalent to the fraction of the school days in
    9·1 answer
  • There are 49 dogs signed up for a dog show. There are 36 more small dogs than large dogs. How many small dogs have signed up to
    13·2 answers
  • Please help ASAP!<br> find the coordinates of each figure after the given transformation
    9·1 answer
  • 100 POINTS FOR HELP !!!!!!!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!