9514 1404 393
Answer:
48 kph
Step-by-step explanation:
The distance is immaterial, as long as it is the same at both speeds. The total time for some distance d is ...
t = d/40 +d/60
And the average speed is ...
2d/t = 2d/(d(1/40 +1/60) = 2/(1/40 +1/60) = 2(40)(60)/(40+60) = 4800/100 = 48
The average rate for the round trip is 48 kph.
_____
Additional comment
This value is called the harmonic mean of the two speeds. It is the reciprocal of the average of the reciprocals of the speeds.
Quadratic shifted left by
1 unit vertical stretch by a
factor of 1.
Answer:
1(x+1)^2
Step-by-step explanation:
*25 points* an someone pls tell me how many solutions this equation have
Answer:
infinite number of solutions
Step-by-step explanation:
4(z - 5) + 2 = 4z - 18 ← distribute and simplify left side
4z - 20 + 2 = 4z - 18
4z - 18 = 4z - 18 , which reduces to
0 = 0 ← a true statement
This indicates the equation has an infinite number of solutions
. A straight line passes through the point (-1,2) and its distance from the origin is
one unit. Find its equation.
Answer:
y = -1/2x + 3/2
Step-by-step explanation:
(2-0)/(-1-0) = -1/2
2 = -1/2(-1) + b
2 = 1/2 + b
b = 3/2
Answer: y = -1
Step-by-step explanation:
Assuming "distance from the origin is one unit" means distance on the x axis, a vertical straight line having an x-intercept of -1 would satisfy thede requirements. y = -1 isn't much of an equation, but it goes through (-1,2) and is 1 unit (-1) from the origin.
Simplify the expression.
options:
33
38
34
39
Step-by-step explanation:
the answer is
[tex] {3}^ {9} [/tex]
the explanation is that {3^3}^4 = 3^12
and 3^12 x 3^2 / 3^ 5 = 3^9
The area of Ms. McCarthy’s garden measures 600 square feet. She plants vegetables in 75% of her garden and flowers in the remaining section. What is the area of the garden that Ms. McCarthy plants with flowers?
Answer
25
Step-by-step explanation:
100% - 75% = 25%
25/100 x 600 = 150 square feet
Sam works for 6 hours at $10.25 per hour. how much does she earn?
Answer:
$61.50
Step-by-step explanation:
1h=$10.25
6h=$10.25×6
=$61.50
Answer:
$61.5
Step-by-step explanation:
6t*10.25
= 61.5
Find the difference between (4, -2) and (-2, 3) THE ANSWER IS 7.8 BUT PLEASE EXPLAIN HOW YOU GOT IT!
HELP ASAP (I'll mark brainliest if you answer within the next 5 mins!!)
Answer:
√61
Step-by-step explanation:
(4,-2) - (-2,3) = (6,-5)
6^2 + (-5)^2 = 61
square root both sides to get 7.8
what is 6-11a>-49 and 5a+10≥-35 will mark brainliest
Step-by-step explanation:
6-11a>-49
-11a>-49-6
-11a>-55
a<5.
Now, according to the question, if it is
W = {0,1,2,3,4}
N = {1,2,3,4}
Z = {...,-2,-1,0,1,2,3,4}
5a+10≥-35
5a≥-35-10
5a≥-45
a≥-9.
Now, according to the question, if it is
W = {-9,-8,-7,-6,-5,-4,-3,-2,-1,01,2,3...}
Z = {-9,-8,-7,-6,-5,-4,-3,-2,-1,01,2,3...}
Now, according to your domain you will do it .
hope this helps you.
Determine whether the ordered pair is a solution of the linear equation y = -3/2x + 8 (2/37)
Answer:
No it is not a solution of the linear equation
Step-by-step explanation:
it is not a solution because
37= -3/2(2)+8
37= -3+8
37=5
Any math experts please factor this thank you have a blessed day
How do you write f(x)=|x-7| as a piece wise function
Answer:
f(x) = { x+9 x ≥ − 9
-x -9 x < -9
OMGGGGGGG PLSSS HELP ME WITH THIS QUESTION, IM SUPER STUCK PLS PLS PLS ITS DUE VERY SOON!!!! EXPLAIN PLSSS, WILL MARK THE BEST ANSWER BRAINEST
The equation of line j is y =-5/8x+4/9. Line k is parallel to line j. What is the slope of line k?
Answer:
using the formula
y= mx+ c
comparing these;
m= -5/8
when two lines are parallel they are always equal
so the slope of line k= -5/8
Step-by-step explanation:
PLS MARK BRAINLIEST
The pressure on a diver in the water varies directly as the depth. If the pressure is 3.6 Ib/in^2 when the depth is 8ft, what is the pressure when the depth is 30ft.
I give Brainliest! Please show your work
Answer:
13.5 lb/in^2
Step-by-step explanation:
8ft = 3.6 lb
30ft= ?
8ft÷30ft = 3.75
this means 8ft goes into 30ft 3.75 times
3.6lb× 3.75=13.5lb/in^2
you times the pressure of 8ft by 3.75 to find how much pressure there is at 30ft
PLEASEEEE HELPPPPPPPPPP
Answer:
-1/2, +1/4, -1/8, +1/16, -1/32, +1/64
Step-by-step explanation:
multiplying a negative by a negative makes it a positive. Multiplying a positive by a negative makes it a negative. The order will be negative, positive, negative, positive, negative, positive, etc.
Hope this helps!
Answer the answer is the third one
A shape is shown on the graph: A coordinate grid is shown from positive 8 to negative 8 on the x-axis and from positive 8 to negative 8 on the y-axis. A triangle is shown on ordered pair 2, negative 2 and 4, negative 2 and 2, negative 6. Which of the following is a reflection of the shape? (5 points) Group of answer choices A coordinate grid is shown from positive 8 to negative 8 on the x-axis and from positive 8 to negative 8 on the y-axis. A triangle is shown on ordered pair negative 2, negative 2 and negative 4, negative 2 and negative 4, negative 6. A coordinate grid is shown from positive 8 to negative 8 on the x-axis and from positive 8 to negative 8 on the y-axis. A triangle is shown on ordered pair 2, 2 and 4, 2 and 2, 6. A coordinate grid is shown from positive 8 to negative 8 on the axis and from positive 8 to negative 8 on the y-axis. A triangle is shown on ordered pair negative 2, negative 4 and negative 6, negative 4 and negative 6, negative 2. A coordinate grid is shown from positive 8 to negative 8 on the axis and from positive 8 to negative 8 on the y-axis. A triangle is shown on ordered pair 2, 2 and 2, 4 and 6, 2.
Answer:
Step-by-step explanation:
the answers the second one.
Answer:
D
Step-by-step explanation:
the answer is d
Evaluate (4/25) 1/2
A 4/5
B 4/25
C2/5
D2/25
2/25
Step-by-step explanation:
[tex]\begin{aligned}\tt\left(\frac{4}{25}\right)\cdot\frac{1}{2}&=\tt\frac{4}{50}\to(\div~2)\\&=\tt\frac{2}{25}\end{aligned}[/tex]
Which equations are true for x = –2 and x = 2? Select two options x2 – 4 = 0 x2 = –4 3x2 + 12 = 0 4x2 = 16 2(x – 2)2 = 0
The equation x² - 4 = 0 and 4x² = 16 have roots of x = -2 and 2 so option 1st and 4th are correct.
What are the roots of an equation?Roots of an equation are the solution of that equation, since an equation consists of hidden values of the variable so to determine them by different processes and then the resultant is called roots.
For example root of x -4 = 0 is x = 4 so 4 will be the only root of this linear equation.
The number of roots of an equation depends on the degree of the equation for example number of roots of quadratic equation are 2.
Given the roots
01)
x = -2
square both sides
x² = 4
x² - 4 = 0
02)
x = 2
Square both sides
x² = 4
Multiply by 4 on each side
4x² = 16
Hence "The equation x² - 4 = 0 and 4x² = 16 have roots of x = -2 and 2".
To learn more about the roots of equation,
https://brainly.com/question/12029673
#SPJ6
Which organism has an exoskeleton
crab
tree
deer
elephant
PLS HURRY!!!!
a crab has a exoskeleton
What is the solution to the inequality 1 2/3 > r - 7/12
Answer:
r ≤ 2 1/4
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Equality Properties
Rewriting Fractions
Step-by-step explanation:
Step 1: Define
1 2/3 ≥ r - 7/12
Step 2: Solve for r
Rewrite: 5/3 ≥ r - 7/12
Isolate r: 9/4 ≥ r
Rewrite: r ≤ 9/4
Reduce: r ≤ 2 1/4
Here we see that any number r less than or equal to 2 1/4 will work as a solution to the inequality.
What is 0.071 as a fraction in lowest terms?
71/10
71/1000
71/50
71/100
Answer:
71/1000
Step-by-step explanation:
cause ik math and I really not smart at the.same time
0.071 as a fraction in the lowest term is [tex]\frac{71}{1000}[/tex]
What is the lowest term?If the numerator and denominator of a fraction are relatively prime, that is, if they only share the number one, then the fraction is said to be stated in the lowest terms.0.071 in fraction is [tex]\frac{71}{1000}[/tex]
because 71 and 1000 don't have greatest common factor so the lowest term is also the same.
Therefore, 0.071 as a fraction in the lowest term is
To learn more about the lowest term, refer to
https://brainly.com/question/17220365
#SPJ2
Two fifth of pupils in a standard 7 class were girls.There were 27 boys in the class. ( a) how many girls were there. (b) how many peoples were there in the standard 7 class
Answer:
a. 18
b. 45
Step-by-step explanation:
The question states that 2/5 of the class are girls which means 3/5 are boys:
[tex]\frac{3}{5} = 27[/tex]
Divide this value by 3 to get the value of [tex]\frac{1}{5}[/tex]:
27 ÷ 3 = 9
Multiply this by 5 to find [tex]\frac{5}{5}[/tex], the total pupils in the class:
9 x 5 = 45
As the number of girls is [tex]\frac{2}{5}[/tex] of the total pupils:
9 x 2 = 18
So there are 18 girls in the class which has a total pupil size of 45.
Hope this helps!
Step-by-step explanation:
according to question of ⅖ are girls than ⅗ are boys
so let the number of girls be x
so,
→ ⅗ of x = 27
→ x = 27 × 5/3 = 9×5 = 45
→ x = 45
a ) 45 - 27 = 18
than no. of girls is 18.
b) thier are 45 students in total.
hope this answer helps you dear...take care and may u have a great day ahead!
there are 25 students in class 2-11 and 20% wear glasses. How many wear glasses?
Answer:
Five students wear glasses.
Step-by-step explanation:
20 percent of 25 is 5
We are given that 25 students in the class and 20% wear glasses.
Take 20% of 25 to calculate how many students wear glasses.
[tex]25 \times 20 \%=25 \times 0.20[/tex]
[tex]= 5[/tex]
5 students in class 2-11 wear glasses. Let me know if you have any questions, thanks!
A total of 176 valves were used for 8 cars as
they were being assembled. The same number
of valves were used for each car. How many
valves were used for each car?
BECAUSE IF YOU DIVIDE 176 TO 8 THE ANSWER WILL BE 22.
176÷8=22
HOPE IT HELPS YOU
Has anyone done Exponential Growth and Decay (in mathematical models with application A) on sos or odysseware and gotten a prefect score?? Pls help!
I need help on the whole assignmnet but particularly this question..
Answer:
1) 62.5
2) 50
3) 75
4) 100
Step-by-step explanation:
1)
Because it has a half-life of 25 days, half of it will decay after 25 days.
After [tex]25*4=100[/tex] days, there will be [tex](1/2)^{4}=1/2^{4}=1/16[/tex] of it left.
So, [tex]1000/16=\boxed{62.5}[/tex].
2)
Because it has a half-life of 25 days, half of it will decay after 25 days.
After [tex]25*3=75[/tex] days, there will be [tex](1/2)^{3}=1/2^{3}=1/8[/tex] of it left.
So, [tex]400/8=\boxed{50}[/tex]
3)
Because it has a half-life of 25 days, half of it will decay after 25 days.
After [tex]25*2=50[/tex] days, there will be [tex](1/2)^2=1/2^{2}=1/4[/tex] of it left.
So, [tex]300/4=\boxed{75}[/tex].
4)
The only answer left is [tex]\boxed{100}[/tex] grams. You can solve it the same way you solved the previous steps.
(50 POINTS^^ JUST NEED HELP ^^)
Which statement correctly describes the relationship between the graph of f(x)=x and the graph of g(x)=f(x)+5 ?
A)The graph of g(x) is the graph of f(x) translated 5 units up.
B) The graph of g(x) is the graph of f(x) translated 5 units right.
C) The graph of g(x) is the graph of f(x) vertically compressed by a factor of 5.
D) The graph of g(x) is the graph of f(x) vertically stretched by a factor of 5.
2. The graph of function g(x) is a vertical stretch of the graph of function f(x)=x by a factor of 6.
Which equation describes function g(x)?
A) g(x)=6f(x)
B) g(x)=f(x)−6
C) g(x)=16f(x)
D) g(x)=f(x)+6
After 3 years, a $1,500 investment is worth $1,680. What is the interest rate on the investment?
A. 0.04 percent
B. 2.0 percent
C. 4.0 percent
D. 37.3 percent
Answer:
the answer is C.
Step-by-step explanation:
your welcome..
Answer:
youre answer would be 4 so that would be C
This is the Length of Arc....pls. try to answer.
Answer:
75 cmmmmmmmmmmmmmmmmmm
2x7=9
Can anybody help me with this??
Answer:
2 times 7 is 14
2,4,6,8,10,12,14
Step-by-step explanation:
hope this helps
a bag contains 13 triangles. I chose one at random. what is the probability that the sum of the angles measures of the one i chose to 180degrees
