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
Nikolay [14]
3 years ago
8

Need help will give 14 points

Mathematics
1 answer:
azamat3 years ago
6 0

Answer:

1) False. 2) False.

Step-by-step explanation:

1) False. 2) False.

1) is false because it says, "A total of 40 students can type from 0-59 words per minute." 0-14w=5s, 15-29w=10s, 10-44w=14s, and 45-59w=20s. w= words per minutes s= number of students (BTW) 5+10+14+20=54 not 40

2) is false because it says, "The number of students who typed 45-59 words per minute is equal to the number of students who typed 15-39 and 0-14."

45-59w=20s

15-39w=10s and 0-14w=5s

10s+5s=15s

20s>15s

You might be interested in
Combine like terms to simplify.<br><br> 2. 3v + w +8 - 2n
AURORKA [14]
3v + w +8 - 2n 
<span>
Simplifying 3v + w + 8 + -2n

Reorder the terms: 8 + -2n + 3v + w
 
Hopes it helped!
</span>
4 0
2 years ago
What are the two missing sides of the triangle ??
igor_vitrenko [27]
Remark
It's a right triangle so the Pythagorean Theorem applies. All you have to do is put the right things in the right places of the formula.

Givens
a = x
b = x + 4
c = 20

Formula and Substitution.
a^2 + b^2 = c^2
x^2 + (x + 4)^2 = 20^2

Solution
x^2 + x^2 + 8x + 16 = 20 Collect the like terms on the left.
2x^2 + 8x + 16 = 20  Subtract 20 from both sides.
2x^2 + 8x + 16 - 20 = 0  
2x^2 + 8x - 4 = 0         Divide through by 2
x^2 + 4x - 2 = 0

Use the quadratic formula
a = 1
b = 4
c = - 2

\text{x = }\dfrac{ -b \pm \sqrt{b^{2} - 4ac } }{2a} &#10; 
\text{x = }\dfrac{ -4 \pm \sqrt{4^{2} + 4(1)(2) } }{2} &#10;

From which x = (-4 +/- sqrt(24) ) / 2
x1 = (- 4 +/- sqrt(4*6) ) / 2
x1 = (- 4 +/- 2 sqrt(6) ) / 2
x1 = -2 + sqrt(6)
x2 = -2 - sqrt(6)  This is an extraneous root. No line can be minus.

x1 = + 0.4495
x2 = x + 4 = 4.4495
6 0
3 years ago
Find the minimum sample size needed to be 99% confident that the sample's variance is within 30% of the population's variance.
liq [111]

The Minimum sample size table is attached below

Answer:

X=173

Step-by-step explanation:

From the question we are told that:

Confidence Interval CI=99\%

Variance \sigma^2=30\%

Generally going through the table the

Minimum sample size is

X=173

7 0
2 years ago
The cost of highlighters is proportional to the number of highlighters purchased. If a 4-pack of highlighters costs $2.40, what
Kaylis [27]

Answer:

$0.60 per highlighter

Step-by-step explanation:

You just do $2.40/4 and you get $0.60

5 0
3 years ago
Help I’m stuck on this( I can’t remember how to do it)
mr_godi [17]
A squared +b squared= c squared
a squared+7 squared =10 squared
a squared + 49= 100
Then subtract 49 from 100 which is 51. Then your square root that number which is 7.14143
5 0
3 years ago
Other questions:
  • A play director set up four rows of eight chairs in front of the stage as shown. A seat is randomly chosen. Which expression giv
    10·1 answer
  • What is the location of the point on the number line that is 4/7 of the way from a = 4 to b = 18?
    10·1 answer
  • △HES ≅ △PBN, HE = 3.9 cm, SB = 0.9 cm, and NS = 4.5 cm<br><br> What is the length of ES ?
    13·1 answer
  • Factor the polynomial 9x-6
    14·2 answers
  • WILL BE MARKED BRAINLIEST!!!! <br> x-y=4 <br> How do you get the y alone?
    11·1 answer
  • What is the arc length of an angle of 2π 3 radians formed on the unit circle? A) π 3 B) 2π 3 C) 4π 3 D) 5π 3
    8·2 answers
  • Simplify this ratio: 100 blue marbles to 60 red marbles
    10·2 answers
  • Solve the proportion. 9/11 = 63/z. Please use "z =" to record your answer. *
    15·2 answers
  • Write the first four terms of sequence Rule:start at 28.6, subtract 3.1
    5·1 answer
  • In a basket, half the fruits are Apples and one fourth the total are Bananas. The remaining fruits are 8 Pears. How many apples
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!