answer.
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
Nezavi [6.7K]
2 years ago
10

When Joanne checked her work by substituting the value of the variable back into the equation, she got an answer of 12.34 = 12.3

3. Explain why Joanne could have gotten the answer correct even though she did not get a true statement when she checked her work.
Mathematics
2 answers:
Arada [10]2 years ago
7 0
See could have got the correct answer because if there was more numbers in the decimal you can round it to get .34 or because both answers have 12.3 and it doesnt matter about the other numbers after 3
s344n2d4d5 [400]2 years ago
5 0

Joanne could have rounded her answer to a specific decimal place, rather than using the exact answer. If you use a rounded answer to verify your solution, you may get a statement that is not exactly equal. The numbers, 12.34 and 12.33 are very close to each other, so Joanne can assume she solved the multistep equation correctly.


You might be interested in
One way to measure whether the trees in the Wade Tract are uniformly distributed is to examine the average location in the north
tatyana61 [14]

Answer:

Null hypothesis be H₀ : μ = 100

Alternative hypothesis Hₐ : μ < 100

There is sufficient statistical evidence to suggest that the average location of Wade Tract is 100

Step-by-step explanation:

Here we have;

Let our null hypothesis be H₀ : μ = 100 Average location of trees in the Wade Tract is 100

Our alternative hypothesis becomes Hₐ : μ < 100 at 95% confidence level

Proposed average location in Wade Tract, μ = 100

Sample mean, \bar x = 99.74

Standard deviation, s = 58

Sample size, n = 584

The t test formula is therefore;

t=\frac{\bar{x}-\mu }{\frac{s }{\sqrt{n}}}

Therefore, with df = 584 -1 = 583, and α = (1 - 0.95)/2 = 0.025

We have t_{\alpha /2} = -1.65

Plugging in the values into the t test formula, we have t = -0.108338, from which the p-value is given as p = 0.4569 which is much more than the value of α, therefore, we accept the null hypothesis as follows;

There is sufficient statistical evidence to suggest that the average location of Wade Tract = 100.

7 0
2 years ago
Marissa has twice as much money as Frank. Christina has $20 more than Marissa. If Christina has $100, how much money does Frank
qwelly [4]

Answer:

a. Take a grid that shows represents the amount of money Frank has,

Say F,

( shown below ),

b. Since, Marissa has twice as much money as Frank,

So, the amount Marissa has = 2F

If M represents the amount Marissa has,

M = 2F

c. Now, Christina has $20 more than Marissa,

Add 20 to the grid M

d.  The below diagram provides enough information to determine the value of the variable m

e. The amount Christina has = M + 20 = 2F + 20

According to the question,

2F + 20 = 100

2F = 80

F = 40

Hence, the amount frank has = $ 40,

Amount Marissa has = 2(40) = $ 80,

3 0
2 years ago
138+710 is the same as blank + 700
Sveta_85 [38]

Answer: 148

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Given the frequency table, what percentage of the students in grades 9–10 like country music? Round to the nearest whole percent
motikmotik

Answer:

b: 44%

Step-by-step explanation:

From grades 9-10 there are 55 students who like country music.

While there are 125 grades 9-10 students in total.

This gives us a percentage of (55/125) *100% = 44%

8 0
2 years ago
Read 2 more answers
A park district is building an outdoor tennis court based on a scale drawing that measures 30cm long by 13.75 cm and uses the sc
Yuliya22 [10]

The actual area of the tennis court is 264 m²

First use the scale to find the actual dimensions of the court:

1 cm : 0.8m

30 cm in the drawing would be:

= 0.8 x 30

= 24 m outside

13.75cm in the drawing would be:

= 0.8 x 13.75

= 11 m outside

Area of a rectangle (which is what the dimensions resemble):

= Length x width

= 24 x 11

= 264 m²

In conclusion, the area of the tennis court is 264 m²

<em>Find out more at brainly.com/question/12581267.</em>

3 0
1 year ago
Other questions:
  • Holly had $5,000 in her bank account. She withdrew $800 to buy a new bike. What is the percent decrease in the balance of her ac
    8·2 answers
  • Simplify (2x – 2y)(2y + 8) = ?
    15·1 answer
  • A company borrowed $40,000 cash from the bank and signed a 6-year note at 7% annual interest. The present value of an annuity fa
    8·1 answer
  • If f(x) = 3 – 2x and 1/x+5, what is the value of (f/g)(8)? –169 –1 13 104
    5·2 answers
  • On a DVD, information is stored on bumps that spiral around the disk. There are 73,000 ridges (with bumps) and 73,000 valleys (w
    10·2 answers
  • Mrs.Steffen’s third grade class has 30 students in it. The students are divided into three groups(numbered 1, 2,and 3),each havin
    15·1 answer
  • What is the length of segment XY?
    5·2 answers
  • An archer misses 60% of his shots how many shots must he make before he gets 100 hits?​
    7·1 answer
  • What value of x makes this equation true?<br> -12 + 5x = -24 + x
    9·1 answer
  • In how many ways can you place 50 identical balls in six distinct urns such that each urn contains an odd number of balls
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!