Let the number of hours be x.
70 + 80x < 100x
20x > 70
x > 3.5
The speed of sound in hydrogen is about 3.9 times its speed in air. If its speed in
hydrogen is almost 1287 m/s, what is its speed in air?
Answer:
330
Step-by-step explanation:
Answer:
330 m/s
Step-by-step explanation:
Divide 1287 m/s by 3.9 to get the speed of sound in air as given that the speed of sound in hydrogen is 3.9 times it's speed in hydrogen.
Hope this makes sense.
Good luck!!
ASAP PLEASE HELP IM TIMED WILL MARK BRAINLIEST
Letr stand for "O > 2" and s for "2<5'. What is the truth value for r ^ s? Why?
A)
True; the truth value of s is true.
B)
False; the truth value of r is false.
C)
False; the truth value of s is false.
D)
The truth value cannot be determined because the statements are a
contradiction.
Answer: im sorry that nobody got to you, im having the same problem right now
Step-by-step explanation:
Answer: FALSE
Step-by-step explanation:
x ∧ y is true only when x and y are both true
So, since r and s are both false, r ∧ s is also false.
Therefore, s ∧ (r ∧ s) is false since r ∧ s is false.
triangle ABC is being dilated with center of dialation at the origin. The image of c, point C', has coordinates of (7.2, 3.6). What is the scale factor of the dilation and what are the coordinates of point A'?
Answer:
4
Step-by-step explanation:
Coordinates of the image point A' will be (-3.6, 3.6).
Rules for the transformation:If a point (h, k) is dilated by scale factor 'a' about the origin, coordinates of the image point point C' will be → (ah, ak)If a point C(6, 3) is dilated by a scale factor 'a', coordinates of the image point C' will be → (6a, 3a)From the graph attached, image point of C(6, 3) is C'(7.2, 3.6)
By the rule of transformation → (6a, 3a) = (7.2, 3.6)
6a = 7.2 ⇒ a = 1.2
Coordinates of point A → (-3, 3)
If the point A is dilated by a scale factor 1.2 about the origin,
Coordinates of the image point A' will be → A'(-3×1.2, 3×1.2)
→ A'(-3.6, 3.6)
Find out more information about the transformation here,
https://brainly.com/question/488929?referrer=searchResults
3.3g+4=1.3g+8 helppp pls
Answer: 2
Step-by-step explanation:
3.3 x 2 = 6.6
6.6 + 4 = 10.6
1.3 x 2 = 2.6
2.6 + 8 = 10.6
Three fifths of the children in a school are boys. 7/8 of the girls in the school are right-handed. What fraction of the children in the school are left-handed girls
Answer:
To find the answer we only need to know,
Total no.of girls and Total no.of right handed girls.
So,
Total no.of right handed girls = 7/8
Total no.of girls = 8/8 (as given in question)
Total no.of left handed girls is,
(Fraction of total no.of girls) - (Fraction of total no.of left handed girls)
= 8/8 - 7/8
= 1/8
∴ 1/8 of the girls in the school are left handed.
The ratio of the present age of mother and daughter is 3:1. Six years ago the ratio of their age was 6 : 1. Find their present age.
Answer:
30 and 10
Step-by-step explanation:
Given ratio of age = 3 : 1 = 3x : x ( x is a multiplier )
Six years ago their age ratio was
3x - 6 : x - 6 = 6 : 1 ← express in fractional form
[tex]\frac{3x-6}{x-6}[/tex] = [tex]\frac{6}{1}[/tex] ( cross- multiply )
6(x - 6) =3 x - 6
6x - 36 = 3x - 6 ( subtract 3x from both sides )
3x - 36 = - 6 ( add 36 to both sides )
3x = 30 ( divide both sides by 3 )
x = 10
Thus their present ages are
mother = 3x = 3 × 10 = 30
daughter = x = 10
Azel has 10 apples and Emily has 5 apples
Where does emily live?
A. Port geese 2546
B. In Atlanta
C. Nowhere
D. All the above
Answer: I think all of the above
Step-by-step explanation:maybe there traveling so…
Which of the following graphs could be the graph of the function f(x)=.03x2(x2-25)
Answer:were are the graphs
Step-by-step explanation:
Convert − 6 7to a decimal. Go out 3 decimal places and round as appropriate.
Answer:
-0.85714285714
Rounded answer:
-0.86
Step-by-step explanation:
Which of these describes the system of linear equations below?
3x-2y=7
6x-4y=14
a) the system has no solutions.
b) the system has infinitely many solutions.
c) the ration of the-coordinate to the y-coordinate of the only solution is 2 : 1.
d) the difference between the x-coordinate and y-coordinate of the only solution is one.
Given:
The system of equations is
[tex]3x-2y=7[/tex]
[tex]6x-4y=14[/tex]
To find:
The correct statement for the given system of equations.
Solution:
On comparing the given equations and general form of linear equation, i.e., [tex]ax+by+c=0[/tex], we get
[tex]a_1=3,b_1=-2,c_1=-7[/tex]
[tex]a_2=6,b_2=-4,c_2=-14[/tex]
Here,
[tex]\dfrac{a_1}{a_2}=\dfrac{3}{6}=\dfrac{1}{2}[/tex]
[tex]\dfrac{b_1}{b_2}=\dfrac{-2}{-4}=\dfrac{1}{2}[/tex]
[tex]\dfrac{c_1}{c_2}=\dfrac{-7}{-14}=\dfrac{1}{2}[/tex]
Since, [tex]\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}=\dfrac{c_1}{c_2}[/tex], therefore, the two equations are equivalent and the system has infinitely many solutions.
Hence, the correct option is b.
A student's work to solve an equation is shown.
9514 1404 393
Answer:
incorrectlyone solutionStep-by-step explanation:
The third line of the solution is incorrect. It should be ...
5x +2 = -5x +2
Then the one solution can be found:
10x = 0 . . . . . . . . . add 5x-2 to both sides
x = 0
Help!!! 100 POINTS
Examine the number line and select all the statements that are true.
The sum of a and 0 is positive.
The product of a and c is negative.
The quotient of b and a is positive.
The sum of a and b is positive.
The quotient of c and 0 is undefined.
b < a
Answer:
the product of a and c is negitive
Step-by-step explanation:
Answer:
The second one is true
The third one is true
The fourth one is false
The fifth one is true
The sixth one is false
Classify the following triangle. Check all that apply.
O A. Obtuse
B. Equilateral
c. Right
D. Acute
O E. Scalene
OF. Isosceles
Answer:
This is an Equilateral Acute triangle.
Evaluate the value of the expression
4(x+2-5x) when x=2
Answer:
-24
Step-by-step explanation:
plz mark brainlyest
Expand: -3(x – y + 5)
Answer:
-3x+3y-15
Step-by-step explanation:
;)
Answer:
-3x+3y-15
Step-by-step explanation:
-3*x= -3x
-3*-y= 3y
-3*5= -15
A lotion is made from an oil blend costing $1.50 per ounce and glycerin costing $1.00 per ounce. Four ounces of lotion costs $5.50.
A table titled Lotion, showing Ounces, Cost per Ounce, and Total. The first row shows, Oil Blend, and has 4 minus g, 1.50, and x. The second row shows Glycerin, and has g, 1.00, and blank. The third row shows, Mixture, and has 4, blank, and 5.50.
Answer:
(4 – g) 1.5
Step-by-step explanation:
Trust
Answer:
(4 – g) 1.5
Step-by-step explanation:
Draw a line through the point (−2,−2) with a slope of 1/4. Draw a line through the point (2, 0) with a slope of 1/4
Answer:
Step-by-step explanation:
The standard equation of a line in point-slope form is expressed as;
y-y0 = m(x-x0) where:
m is the slope
b is the y-intercept.
Given the following
Slope = 1/4
(x0, y0) = (-2, -2)
The equation becomes;
y-(-2) = 1/2(x-(-2))
y+2 = 1/2(x+2)
2(y+2) = x+2
2y+4 = x+ 2
2y-x = 2-4
2y-x = -2
For the line through the point (2, 0) with a slope of 1/4
y - 0 = 1/4(x-2)
y = 1/4(x-2)
4y = x- 2
4y - x = -2
Find the plotted lines below:
Learn more here: https://brainly.com/question/17003809
34. What is the smallest subset containing 100 ?
A. Irrational Numbers
B. Whole Numbers
C. Natural Numbers
D. Rational Numbers
Which statement must be true about line TU?
Line TU is parallel to line RS.
Line TU is perpendicular to line RS.
Line TU has no slope.
Line TU has a slope of –5.
Answer:
line TU is parallel to line RS
Step-by-step explanation:
edg2020
Answer: line TU is parallel to line RS
Step-by-step explanation:
Is 0.23 a rational number? Choose the best explanation.
Answer:
yes because it can be written as 23/100
Step-by-step explanation:
I did this before and I have gotten it correct.
Please answer !!!!!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!!!!
Answer:
m∠B = 69°
General Formulas and Concepts:
Order of Operations: BPEMDASEquality PropertiesComplementary Angles add up to 90°Step-by-step explanation:
Step 1: Define
m∠A = (x + 9)°
m∠B = (7x - 15)°
Step 2: Set up equation
m∠A + m∠B = 90°
(x + 9)° + (7x - 15)° = 90°
Step 3: Solve for x
Combine like terms: 8x - 6 = 90Add 6 to both sides: 8x = 96Divide both sides by 8: x = 12Step 4: Find m∠B
Define: m∠B = (7x - 15)°Substitute: m∠B = (7(12) - 15)°Multiply: m∠B = (84 - 15)°Subtract: m∠B = 69°Does anyone know this
Answer:
2.5
Step-by-step explanation:
2.5
Answer:
2.5s
Step-by-step explanation:
Time = [tex]\frac{Distance}{Speed} =\frac{5 meters}{2m/s} =2.5s[/tex]
Dierdre’s work to solve a math problem is shown below.
Problem: How many 1 and one-half-foot pieces can be cut from a 12-foot length of ribbon?
Step 1:
1 and one-half divided by 12 = n
Step 2:
Three-halves divided by 12 = n
Step 3:
Three-halves times StartFraction 1 Over 12 EndFraction = n
Step 4:
StartFraction 3 Over 24 EndFraction = n
Answer:
One-eighth = n
What was Dierdre’s first error?
She switched the divisor and the dividend in step 1 when creating an equation to model the problem.
She used an improper fraction in step 2 that is not equivalent to 1 and one-half.
She replaced the divisor by its reciprocal in step 3 instead of replacing the dividend by its reciprocal.
She reduced the fraction in step 4 incorrectly.
Step-by-step explanation:
step 1
Answer:
Step 1)-She switched the divisor and the dividend in step 1 when creating an equation to model the problem.
Step-by-step explanation:
I got it right on my unit test :>
Joey completed 3,556 push ups over a 4-week period (there are 7 days in a week). Joey did the same number of push-ups every day. How many push-ups did Joey do each day
Answer:
127 per day
Step-by-step explanation:
Total pushups in 4 weeks = 3,556
4-week period( 7 days a week) = 4 × 7
= 28 days
How many push-ups did Joey do each day?
Push ups per day = Total push ups / Total number of days
= 3,556 / 28
= 127
Push ups per day = 127
Joey did 127 push-ups each day for a 4-week period( 7 days a week)
Robinson Crusoe is an adventure novel about one man's seafaring adventures that change who he is and how perceives the world. Describe a significant event in your life that made you stop and think about your own destiny or approach to life.
long division method hcf of 430,516 and 817
Answer:
you need to add up 430,516 x 817 and see what it gives you for my exclusive seen 1247.516
Step-by-step explanation:
Which sets of values belongs to the domain and range of a relation
full answer:
As we know that
The domain of a relation is defined as the set of all possible independent values the relation can really take - basically the group of all possible inputs.
The range of a relation is defined as the set of all possible dependent values the relation can generate from the domain values - basically the group of all possible outputs.
As
The domain is the set of independent values, meaning the set of x-coordinates of the ordered pairs as x is an independent variable.
The range is set of dependent values, meaning the set of y-coordinates of the ordered pairs as y is an independent variable.
So, in the set of ordered pairs of a relation
Xiao bought 4 3/10 gallons of gas that cost $2.50 per gallon.
What is the total cost of the gas?
Enter your answer in the box.
Answer:
maybe the attached image is helpful
PLEASE HELP! I REALLY NEED HELP WITH THIS!! I WILL MARK BRAINLIEST!!!
All of the following expressions are equivalent to 12w + 6, except:
-1(12w - 6)
(3 + 6w)2
6(1 + 2w)
-1(-12w - 6)
Answer:
2nd one
Step-by-step explanation:
The table below represents the number of hours a student worked and the amount of money the student earned. What is the initial amount this student is paid? (Base pay, when number of hours, h = 0) I’LL PAY YOU 30 DOLLARS IN CASHAPP RIGHT NOW WHEN YOU DO IT!
The initial amount this student is paid is 0 and this can be determined by using the two-point slope form of the line.
Given :
The given table represents the number of hours a student worked and the amount of money the student earned.
The following steps can be used in order to determine the initial amount this student is paid:
Step 1 - The two-point form of the line can be used in order to determine the initial amount this student is paid.
Step 2 - So, the linear equation that represents the given situation is:
[tex]\rm \dfrac{d-50}{h-8}=\dfrac{93.75-50}{15-8}[/tex]
Step 3 - Simplify the above expression.
[tex]\rm \dfrac{d-50}{h-8}=6.25[/tex]
d - 50 = 6.25h - 50
d = 6.25h
Step 4 - Now, substitute the value of (h = 0) in the above expression.
d = 0
Therefore, the correct option is D) There is no base pay.
For more information, refer to the link given below:
https://brainly.com/question/11897796
