Answer:
b
Step-by-step explanation:
the following equations can be determined from the question
16n + 8o = 336 equation 1
n + o = 30 equation 2
where n = new books
o = old books
Multiply equation 2 by 8
8n + 8o = 240 equation 3
subtract equation 2 from 1
8n = 96
n = 12
substitute for n in equation 2
12 + o = 30
o = 18
Answer:
B. 12 new, 18 used
Step-by-step explanation:
Hope this helps!
I need some help!! I will try to give brainliest!!!
y = 4/5x - 5
y = -5/4x - 5
y = -4/5x - 5
y = 4/5x + 5
Answer:
The answer is the 3rd one.
Erin has two cats. The larger cat weighs 2.6 pounds more than the smaller cat. The combined weight of the two cats is 19.6 pounds. What is the weight, in pounds of the smaller cat?
Answer:
7.2
Step-by-step explanation:
just divide the total weight by 2 and add 2.6. after adding 2.6 you subtract that weight from the total.
5. A simple random sample is defined by
(A) the method of selection
(B) how representative the sample is of the population
(C) whether or not a random number generator is used
(D) the assignment of different numbers associated with the outcomes of some
chance situation
(E) examination of the outcome
Answer:
b. because if there is a bigger population the sample will be more random
Cars enter a car wash at a mean rate of 3 cars per half an hour. What is the probability that, in any hour, at least 3 cars will enter the car wash
Answer:
0.938
Step-by-step explanation:
Using the poisson probability relation:
P(x = x) = (e^-λ * λ^x) ÷ x!
λ = 3 per half an hour = 6 cars per hour
P(x ≥ 3) = 1 - [p(x = 0) + p(x = 1). + p(x = 2)]
P(x ≥ 3) = (e^-6* (6^0 + 6^1 + 6^2/2!))
P(x ≥ 3) = 1 - (e^-6 * (1 + 6 + 18)
P(x ≥ 3) = 1 - (e^-6 * 25)
P(x ≥ 3) = 1 - (0.0024787 * 25)
P(x ≥ 3) = 1 - 0.0619688
P(x ≥ 3) = 0.9380311
= 0.938
Find the surface area of the following figures.
with solution please. T-T
Answer:
1.a=5cm
Surface area :6a²=6×5²=150cm²
2.r=3cm
h=5cm
total surface area of cylinder =2πr(r+h)
=2π×3(3+5)=48π cm²
3.
l=4m
b=5m
h=2m
now.surface area =2(lb+lh+bh)
=2(4*5+4*2+5*2)
=76m²
4.
r=6cm
surface area =4πr²=4*π*6²=144πcm²
5.
slant height (S)=8cm
length =breadth=(L)=4cm
Surface area of pyramid =area of base + 2* area of trainglular face
=L²+2*S*L
=4²+2*8*4
=80cm²
PLEASE LIKE HONESTLY PLEASE
Answer:
250 in²
Step-by-step explanation:
There are four identical rectangles so therefore area of one rectangle times 4. Then add the sum of the areas of the two identical squares.
4( l x b) + 2( l x b)
4( 10 x 5) + 2(5 x 5)
4(50) + 2(25)
200 + 50
Therefore 250 in²
centipede would beat frog any day also ez Q for u
Answer:
32
Step-by-step explanation:
Dividing by a fraction is the same as multiplying by the reciprical of the fraction, i.e. dividing by 1/4 is the same as multiplying by 4/1 :)
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the product of nine, y and x not simplified.
Answer:
9yx
Step-by-step explanation:
product means multiply.
nine, y and x
9yx
What is the perimeter, in -inches, of the square shown below? A 8 B 16. C 32 D 64
Answer:
The perimeter, in inches, is 32.
Step-by-step explanation:
Since this shape is a square, we know that all sides are equal.
The information given to us is that one side of the square measures 8 inches.
8 + 8 + 8 + 8 = 32
Answer:
c 32
Step-by-step explanation:
Squares have 4 sides of the same length
8 * 4 = 32
help me im so lostttttttttttttttttttttttttttttttttttttttttttyytytytytyy
Answer:
First of all what are those white figure?
Answer: 36 cubic feet
Step-by-step explanation:
PLEASE HELP 7TH GRADE MATH
BRAINLIEST-SHOWS WORK
PLEASE HELP
ANSWE 1 OR MORE AN WILL MARK BRAINLIEST 1 OR MORE
Answer:
[tex]2\pi \times r[/tex]
1. 2×3.14×80
=502.4 m
4. 90 pound on Earth weighs 34 pounds on Mars.
If it weighs 135 pounds on earth, it will weigh x pounds on Mars
=90×=135×34
=90x=4590
=x=4590÷90
x=51 pounds
So therefore it weighs 51 pounds on Mars.
Step-by-step explanation:
in question 4 you have to cross multiply
what is the constant rate change shown in the graph below?
Answer:
the two points be
(0,0) and (1,-3)
slope [m]=[-3-0]/[1-0]=-3
constant rate is-3.
Help me plsssssssssssss
9514 1404 393
Answer:
8.4
Step-by-step explanation:
The given segment relations tell you that the parallel lines are equally spaced. This means that ...
WV = 3×WY
WV = 3×2.8
WV = 8.4
Find two consecutive odd images interfere whose sum is 36
Which of the following equation could be used to solve the problem
Answer:
Step-by-step explanation:
The integers are: x, x+2
Them, x + x+ 2 = 36
2x +2 = 36
For Mother's Day, Meghan bought her mother flowers that cost $25.34 and a card that was $2.99. She also bought herself a candy bar. If she paid with three $10 bills and got 58 cents back, how much was her candy bar.
Answer:
1.10
Step-by-step explanation:
Answer:
$1.09
Step-by-step explanation:
3 10 dollar bills is $30
$30 - $25.34 - $2.99 - $0.58 = $1.09
GIVING BRAINLY FOR WHOEVER ANSWERS THIS
Answer:
20%
Step-by-step explanation:
Probability is always expressed as a part of a whole, thereby in fractions or percentages. From the statistics gathered, it said that 80% of the time, the plane arrives right on schedule in El Centro. That means that the probability of NOT arriving on time is the other portion, which is 20%. The answer is 20%.
Which of these lines is perpendicular to the line 5y = -6x + 2?
Answer:6y= -5x + 3
Step-by-step explanation:
The product of the slope of the perpendicular lines is equal to a negative one. Then the equation of the perpendicular line is 6y = 5x.
What is the linear system?A linear system is one in which the parameter in the equation has a degree of one. It might have one, two, or even more variables.
The equation of the line is given below.
5y = -6x + 2
The slope of the equation is -6/5.
Then the equation of the line which is perpendicular to 5y = -6x + 2 is given as
y = mx + c
The product of the slope of the perpendicular lines is equal to a negative one.
The slope of the perpendicular line will be
(-6/5) m = -1
m = 5/6
Then the equation will be
y = (5/6)x + c
Let the equation is passing through the origin, then we have
6y = 5x
More about the linear system link is given below.
https://brainly.com/question/20379472
#SPJ2
HELP!!! Find the angle measure.
Answer:
AOB=40°
COD=90°
BOD=130°
AOD=180°
which model shows all of these numbers correctly placed one the number line
Answer:
2nd
Step-by-step explanation:
bec 1\8 = 0.125 so it must be close more to 0
and the 1.33 is bigger than 1.25
in new england 47% of the houses have a garage and 36% of the houses have a garage and a backyard what is the probability that a house has a backyard given that has a garage probs and stats
Answer:
The probability that a house has a backyard given that has a garage is 76.60%.
Step-by-step explanation:
Given that in New England 47% of the houses have a garage and 36% of the houses have a garage and a backyard, to determine what is the probability that a house has a backyard given that has a garage the following crossed multiplication must be performed:
47 = 100
36 = X
(36 x 100) / 47 = X
3,600 / 47 = X
76.5957 = X
Therefore, the probability that a house has a backyard given that has a garage is 76.60%.
if jason had2/7 cakes and 5/9 how much wood that be
given the system of equations, what is the value of the system to determinant.
x + y = 8
x + y = 10
-----------------
-2
-1
0
Answer:
0
Step-by-step explanation:
given the system of equations, what is the value of the system to determinant.
x + y = 8
x + y = 10
This can be written in the form AX = b
A is a 2 by 2 matrices
b is a column matrix
Taking the determinant of A
[tex]A =\left[\begin{array}{ccc}1&1\\1&1\\\end{array}\right][/tex]
We are to finds the determinant
|A| = 1(1) - 1(1)
|A| = 1 -1
|A| = 0
hence the required determinant is 0
A ball moves in a straight line has an acceleration of a(t) = 2t + 5. Find the position function of the ball if its initial velocity is -3 cm per second and it’s initial position is 12 cm.
Answer:
[tex]s(t) = frac{t^3}{3} + \frac{5t^2}{2} - 3t + 12[/tex]
Step-by-step explanation:
Relation between acceleration, velocity and position:
The velocity function is the integral of the acceleration function.
The position function is the integral of the velocity function.
Acceleration:
As given by the problem, the acceleration function is [tex]a(t) = 2t + 5[/tex]
Velocity:
[tex]v(t) = \int a(t) dt = \int (2t+5) dt = \frac{2t^2}{2} + 5t + K = t^2 + 5t + K[/tex]
In which K is the constant of integration, which is the initial velocity. So K = -3 and:
[tex]v(t) = t^2 + 5t - 3[/tex]
Position:
[tex]s(t) = \int v(t) dt = \int (t^2 + 5t - 3) = \frac{t^3}{3} + \frac{5t^2}{2} - 3t + K[/tex]
In which K, the constant of integration, is the initial position. Since it is 12:
[tex]s(t) = frac{t^3}{3} + \frac{5t^2}{2} - 3t + 12[/tex]
What is the value of ? x/10 = 2 O A. 5 O B. 8 O C. 12 OD. 20
Answer:
x = 20
Step-by-step explanation:
x/10 = 2
Multiply each side by 10
x/10 * 10 = 2*10
x = 20
prove that P(A∩B)=P(A)∩P(B) for all sets A,B.
Step-by-step explanation:
let,
p(A)={1,2,3,4}
p(B)={3,4,5,6}
p(AnB)={3,4}
now,
p{AnB)=P(A)nP(B){3,4}={1,2,3,4}n{3,4,5,6}{3,4}={3,4}LHS=RHS. proved.
hope it helps.
stay safe healthy and happy.What is the solution to the equation below? Х = 4 -3
Answer:
If there's no other variables involved.
x=1
Answer:
x = 1
Step-by-step explanation:
x = 4 - 3
4 - 3 = 1
Hence, x = 1
please help me solve this
Answer:
20.5
Step-by-step explanation:
By the Triangle Midsegment Theorem, the midsegment connecting the midpoints of two sides of a triangle is parallel to the third side of the triangle, and the length of this midsegment is half the length of the third side. Therefore, (1/2)FH ≡ IH, (1/2)HG ≡ HJ. Knowing that IJ = 8 gives you the presidence to solve for the perimeter.
What is A line that a graph approaches as x or y increases, but never crosses?
Answer:
Asymptotes. The y -axis is a vertical asymptote of the graph. This means that the curve gets closer and closer to the y -axis but does not cross it. Let us consider what happens as the value of x approaches zero from the right for the equation whose graph appears above.
Step-by-step explanation: