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
alukav5142 [94]
3 years ago
14

Divide 450 grams into ratio 7:2

Mathematics
1 answer:
ser-zykov [4K]3 years ago
6 0
Let us assume the common ratio = x
Then from the given question we can write
7x + 2x = 450
9x = 450
x = 450/9
   = 50
Then the quantity 450 grams can be divided in the ratio of 7 : 2 by = 7x:2x
                                                                                                          = (7 * 50) : (2 * 50)
                                                                                                          = 350:100
I hope this is the answer you were looking for and the procedure for finding the answer is also absolutely clear to you.
You might be interested in
I am stuck on how to do 10 percent of $55.86
faust18 [17]

Answer:

read step by step

Step-by-step explanation:

.10×55.86 = 5.58

then subtract $5.58 from your total .

and that will give you the answer

8 0
3 years ago
The mean throwing distance of a football for a Marco, a high school freshman quarterback, is 40 yards, with a standard deviation
Phoenix [80]

Answer:

a) One-tailed t-test about a mean.

b) The null hypothesis would be that there is no significant evidence to conclude that the adjusted grip leads to more distance on the thrown ball.

While the alternative hypothesis is that there is significant evidence to conclude that the adjusted grip leads to more distance on the thrown ball.

Mathematically,

The null hypothesis is represented as

H₀: μ ≤ 40 yards

The alternative hypothesis is given as

Hₐ: μ > 40 yards

c) p-value = 0.00621

d) The graph is presented in the attached image. The p-value obtained is less than the significance level at which the test was performed, hence, we accept the alternative hypothesis and say that there is significant evidence to conclude that the adjusted grip leads to more distance on the thrown ball.

Step-by-step explanation:

a) This test checks if the adjusted grip leads to more distance than before on the ball throws.

So, it is a one tailed test (testing only in one direction), a t-test about a mean.

b) For hypothesis testing, the first thing to define is the null and alternative hypothesis.

The null hypothesis plays the devil's advocate and usually takes the form of the opposite of the theory to be tested. It usually contains the signs =, ≤ and ≥ depending on the directions of the test.

While, the alternative hypothesis usually confirms the the theory being tested by the experimental setup. It usually contains the signs ≠, < and > depending on the directions of the test.

Since this question aims to test if adjusting the grip leads to more distance on the ball thrown.

The null hypothesis would be that there is no significant evidence to conclude that the adjusted grip leads to more distance on the thrown ball. That is, The adjusted grip leads to a distance lesser than or equal to the previous distance on the thrown ball.

While the alternative hypothesis is that there is significant evidence to conclude that the adjusted grip leads to more distance on the thrown ball.

Mathematically,

The null hypothesis is represented as

H₀: μ ≤ 40 yards

The alternative hypothesis is given as

Hₐ: μ > 40 yards

c) To do this test, we will use the z-distribution because there is information on the population standard deviation.

So, we compute the test statistic

z = (x - μ₀)/σ

x = 45 yards

μ₀ = 40 yards

σ = standard deviation = 2 yards

z = (45 - 40)/2 = 2.50

The p-value for a one-tailed test for z-test statistic of 2.50 is 0.00621

d) The sketch of the graph is presented in the attached image.

The interpretation of p-values is that

When the (p-value > significance level), we fail to reject the null hypothesis and when the (p-value < significance level), we reject the null hypothesis and accept the alternative hypothesis.

So, for this question, significance level = 0.05

p-value = 0.00621

0.00621 < 0.05

Hence,

p-value < significance level

This means that we reject the null hypothesis & accept the alternative hypothesis and say that there is enough evidence to conclude that the adjusted grip leads to more distance on the thrown ball.

Hope this Helps!!!

5 0
3 years ago
I have no clue what to do... please help
strojnjashka [21]

Answer:

Multiply the base by the exponent

Step-by-step explanation:

7 0
3 years ago
Answer???????????????????
andrezito [222]
∠ABC is 180°. ∠ABC-∠ABD=68°. Since line BE ∠DBC, 68 divide by 2 is 34°. So ∠EBC is <span>34°.</span>
7 0
2 years ago
The equation y-3=-2(x+5) is written in point-slope form. What is the y-intercept of the line? *
yawa3891 [41]

Answer:

-7

Step-by-step explanation:

y-intercept

x=0

y-3= -2x-10

y=2(0)-10+3

y=0-7

y= -7

(0;-7)

6 0
3 years ago
Read 2 more answers
Other questions:
  • Why can you use fraction multiplication to check the answer to a fraction division problem? How do you use multiplication to che
    14·2 answers
  • Which expression is equvialent to 2x2 + (4x-6x2) + 9 - (6x+3)?
    5·1 answer
  • A record album is 3/16 of an inch thick. How many albums can be stacked to fit in a box 12 inches high? Please show me how you g
    9·1 answer
  • Subract (21x) - (-16 + 7x) can someone help me
    14·1 answer
  • If ST=19 and S lies at -4 , where could T be located?
    7·1 answer
  • 1) The equation for line j can be written as y = 7/6x - 12.
    13·1 answer
  • Need Help. The question is down below
    12·1 answer
  • Given the a^b=x, evaluate the following. <br><br> a^b+2
    6·1 answer
  • Please help it's due today. Also if you don't know please don't answer.​
    10·2 answers
  • The cone in the figure below has a volume of 722 cubic centimeters and a height of 6
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!