Answer:
C. 84
Step-by-step explanation:
2 x 6 x 7 =
12 x 7 =
84
Hope that helps!
s2t-10
if s = -8 and
T= 3/4 please show how you got the answer
Bir okuldaki öğrencilerin
erkektir. Okulda 90 kız öğrenci
olduğuna göre kaç erkek öğrenci vardır?
Answer:
Soru gözükmüyor. Okulda kaç öğrenci var? Bunu söylersen çözebilirim.☺️
5% of a number is 23
Answer:
460
Step-by-step explanation:
5%(calculated %)of what number equals 23?
Answer is 460
I hope it's helpful!
460 is the answer of the question
(5 pts) It takes Jack 3 hours longer to write holiday cards than it takes Jill. Together, they can write them
in 2 hours. How long does it take each person to write the cards working alone?
Answer:
Jack needs 6 hours and Jill needs 3 hours.
Step-by-step explanation:
Let's define the variables:
X = rate at which Jack can write a holiday card.
Y = rate at which Jill can write a holiday card.
Each of them will need a given time to write a card, such that:
X*T = 1 card
We know that Jack needs 3 more hours to write a card than Jill, then Jill needs 3 hours less than Jack, so if Jack needs T hours, Jill will need T - 3 hours
Then we have the equation:
Y*(T - 3 hr) = 1 card
And we also know that when they work together, they need 2 hours, then:
(X + Y)*2 hr = 1 card.
So we have 3 equations:
X*T = 1 card
Y*(T - 3 hr) = 1 card
(X + Y)*2 hr = 1 card.
Now let's ignore the card part just for the equations, then we get:
X*T = 1
Y*(T - 3 hr) = 1
(X + Y)*2 hr = 1
To solve it, we first need to isolate one variable in one of the equations, let's isolate T in the first equation, we get:
T = 1/X
Now we can replace this in the second equation to get:
Y*((1/X) - 3hr) = 1
So now we have two equations:
(X + Y)*2 hr = 1
Y*((1/X) - 3hr) = 1
We need to do the same, isolate one variable in one of the equations, let's isolate Y in the above one:
Y*2hr = 1 - X*2hr
Y = (1 - X*2hr)/2hr
Now we can replace this in the other equation to get:
((1 - X)/2hr)*((1/X) - 3hr) = 1
Now we can solve this for X:
((1 - X)/2hr)*((1/X) - 3hr) = 1
(1 - X)*((1/X) - 3hr) = 2 hr
1/X - 3hr - X*2hr/X + X*2hr*3hr = 2hr
1/X - 3hr - 2hr + X*6hr^2 = 2hr
1/X + X*6hr^2 = 2hr + 3 hr + 2 hr = 7hr
1/X + X*6hr^2 = 7hr
Now we can multiply all by X to get:
X/X + X*(X*6hr^2) = 7hr*X
Now we have the quadratic equation:
(6hr^2)*X^2 - (7hr)*X + 1 = 0
We can find the solutions of this equation if we use the Bhaskara's formula, the solutions are:
[tex]X = \frac{-(-7hr) +- \sqrt{(-7hr)^2 - 4*(6hr^2)*1} }{2*6hr^2} = \frac{7hr +- 5hr}{12 hr^2}[/tex]
Then we have two solutions:
X = (7hr + 5hr)/12hr = 1 hr^-1
And this is the rate at which Jack writes a card, so the actual units are:
X = 0.167 card/hr
Then Jill's rate will be:
Y = (1 - X*2hr)/2hr = (1 - 1card/hr*2hr)/2hr = -0.5 card/hr
So we have a negative rate, this makes no sense, so we can discard this option. The other solution for X is:
X = (7hr - 5hr)/12hr = 0.166... hr^-1
And this is the rate at which Jack writes a card, so the actual units are:
X = 0.166... card/hr
If we have this, then the rate for Jill will be:
Y = Y = (1 - X*2hr)/2hr = (1 - 0.167card/hr*2hr)/2hr = 0.333 card/hr
Then we have:
X = 0.167 card/hr
If we use the first equation, we get:
(0.166... card/hr)*T = 1 card
T = 1 card/((0.166... card/hr)) = 6 hours
Then Jack needs 6 hours to write a card.
And we know that Jill needs 3 hours less than that, then Jill needs 3 hours.
Sixteen is divided by the sum of the number q and 1. The result is four. What is the number.
Answer:
The number is 3.
Step-by-step explanation:
Ok, so here we're solving for a variable. The equation would be:
16 ÷ (q + 1) = 4
We can rewrite this as:
4(q + 1) = 16
First, you need to isolate q + 1. To do that, you to the inverse of the operation. IN this case, division is the inverse of multiplication. So:
4(q + 1) = 16
÷4 ÷4
q + 1 = 4
Alright, now we isolate q. The inverse of addition is subtraction, so we do this:
q + 1 = 4
- 1 - 1
q = 3
Now for our check:
16 ÷ (q + 1) = 4
16 ÷ (3 + 1) = 4
16 ÷ 4 = 4
4 = 4
q = 3
what is the value of f in f/3+22=17
Answer:
F = 15
Good luck! Have a wonderful day!
? QUESTION
Learning Page
The ratio of men to women working for a company is 5 to 4. If there are 243 employees total, how many women work for the company?
OO EXPLANATION
Answer:
108 women
Step-by-step explanation:
add the parts of the ratio together
5 + 4 = 9
divide the total number of employees by 9
243/9 = 27
now multiply the parts of the ratio by 27.
5 X 27 = 135
4 X 27 = 108
Find the surface area of this net.
square centimeters
Answer:
Step-by-step explanation:
area of blue triangle = 0.5×8×3 = 12 cm²
area of A = 5×12 = 60 cm²
area of C = area of A
area of B = 8×12 = 96 cm²
total surface area = 2×12 + 2×60 + 96 = 240 cm²
Answer:
240cm²
Step-by-step explanation:
Elizabeth picked ⅔ off a row of strawberries from her garden. How many rows will Elizabeth have picked if she does this for 4 days?
Celine is undecided as to whether to take a French course or a chemistry course. She estimates that her probability of receiving an A grade would be 1/2 in a French course and 2/3 in a chemistry course. If Celine decides to base her decision on the ip of a fair coin, what is the probability that she gets an A in chemistry
Step-by-step explanation:
1/2=0.52/3=0.6670.5×0.667=0.3331 in 3 chance of getting an A in Chemistry
98 x 24 = (100 - 2 ) x 24 = ?
Answer:
2352
Step-by-step explanation:
(100 - 2) x 24 = 2400 - 48 = 2352
10. A can of coconut milk is 12 cm high and 8 cm in diameter. Calculate the volume of the can.
Use 3 as a value for π.
Answer: [tex]384cm^2[/tex]
Step-by-step explanation:
Volume is base* height
the base a the circle
area of a circle: [tex]\pi r^2[/tex]
the radius is 1/2 of the diameter, so it's 4
[tex]3*(4^2)=\\3*16= 48[/tex]
To find the volume I multiplied it by 8 (height)
[tex]48*8=384[/tex]
I feel like I’m wrong and if I am can someone correct me? Thank you!
find the value of x.
Hey there!
To find the value of x in an equation, you have to solve for x.
Example
Given: 3x - 9 = 0
First, add 9 to both sides:
3x = 9
Then, divide both sides by 3
x = 3
Have a terrifcly amazing day!
4
Jared has a collection of 90 movies on DVD. If
46 of the movies are comedies, 26 are drama,
and the rest are science fiction, what percent of
the movies are science fiction?
A) 18
B) 20
C) 28
D) 32
Answer:
A) 18
Step-by-step explanation:
add 46 and 26, you get 72
now, subtract 72 from 90 and what do you get?
........ not gonna tell me huh? XDD
you get 18, right???
to make sure you calculated correctly, add everything together
46 + 26 + 18 = 90!!!
yay! so from what ive just showed you, what can you determine???
that 18 of the movies are science fiction.
Good luck and I hope this helped, if so... would you please mark me as brainliest?? Thanks!!
I really hate doing area so someone please help me out
Answer:
36
Step-by-step explanation:
You have to split it into 3 different sections,
multiply base times height and
all the answers you got.
Answer:
36
Step-by-step explanation
the top box is 6x4
the connecting box is 3x2
the bottom box is 6x1
6x4=24
3x2=6
6x1=6
24+6+6=36
Area=36
Question 5
A carpet remnant is shaped like a triangle. It has a height of 32 inches and a base of 8 inches. Find the area.
128 square inches
256 square inches
320 square inches
64 square inches
11. Let f(x) = 2x² + 7x + 5
Answer:
(x+1)(2x+5)
Step-by-step explanation:
f(x) = 2x² + 7x + 5
Factor the expression by grouping. First, the expression needs to be rewritten as 2x²+ax+bx+5. To find a and b, set up a system to be solved.
a+b=7
ab=2×5=10
Since ab is positive, a and b have the same sign. Since a+b is positive, a and b are both positive. List all such integer pairs that give product 10.
1,10
2,5
Calculate the sum for each pair.
1+10=11
2+5=7
The solution is the pair that gives sum 7.
a=2
b=5
2x²+7x+5 as (2x²+2x)+(5x+5).
(2x²+2x)+(5x+5)
Factor out 2x in the first and 5 in the second group.
2x(x+1)+5(x+1)
Factor out common term x+1 by using distributive property.
(x+1)(2x+5)
Jessica just put 14.41 gallons of fuel into her car. There were 3.6 gallons in the car to begin with. How much fuel is in jessicas car now PLEASE HURRY!!
Answer:
18.01 gallons
Step-by-step explanation:
14.41
3.6
=18.01
2x-3y = -2
X + 24 = 15
Answer:
No
Step-by-step explanation:
2x-3y= 6xy
How do I find the measure of each marked angle question 14
Answer:
x=38
Step-by-step explanation:
hope this helps!
if angles are on a line like that, both equations added up together will always be equal to 180.
like this:
2x-10+3x = 180
5x-10=180 (combine)
5x=190 (subtract 10 on both sides)
x=38 (divide both sides by 5)
I don't know how to solve this problem
Before you read this!! To me, it looks like 8 is the entire length of lineJL, but it may only be the length of lineJM. I've written the steps for lineJL=8 NOT lineJM=8. If this is not the case and 8 is only the length of lineJM let me know so I can fix my answer!
Step-by-step explanation:
The area of a triangle is A=1/2(b)(h)
B=base
H=height
Your height is found in the line in the middle of the triangle, for you it is 6.
The base is the long bottom line on the triangle (lineJL), for you it is 8.
So let's put it in.
A=1/2(8)(6)
A=24sq units (C)
A tray holds 36 eggs.How many trays are needed to hold 845 eggs.
Answer:
I'm sorry if i'm wrong but I think it's somewhere between 23 or 25
(maybe 24)
Answer:
24 trays
Step-by-step explanation:
845 devided by 36 is 23 with a remainder of 2 so you will need an extra tray to fill all of them.
solve
(3r-1)(2r+2r+3)
Andrew has 1/2 of his assignment left to do. He has three days left to complete it. If he divides up the work evenly over the three days. what fraction of the work should he complete each day to finish on time?
Answer:
the minimum work he can do to complete it in 3 days is 1/3.
So he should do at least 1/3 of the work each day to complete it on time.
Answer = 1/3
Step-by-step explanation:
Which equation represents a linear equation
Answer:
I'm thinking it's A or C
Step-by-step explanation:
I'm sorry I can't decide ;-;
Answer:
The 4th answer.
Step-by-step explanation:
It has the equivalence that each point will be substracted 5 from y and 20 from x, but it won't change the line of the result. Sure, the position, but not the line.
3. What is 256% as a decimal?
Answer:
2.56
Step-by-step explanation:
Answer:
it would be 2.56
Step-by-step explanation:
256 ÷ 100 = 2.56
twice the square root of a number is 12
Let us assume that the number is X
According to the statement:
2✓x = 12
Divide both sides by 2;
✓2 = 6
Square both sides,
x² = 6²
X = 36
Hence the required number is 36.
Find the slope of the line
Answer:
Unrefined
Step-by-step explanation:
If the line is straight, that means it's undefined
The paved area is a square with sides 2 m long.
The paving stones for this area are squares that measure 50 cm by 50 cm
How many paving stones are needed?
Answer:
Step-by-step explanation:
2 meters = 200 cm
200 cm × (1 block)/(50 cm) = 4 blocks
4 blocks by 4 blocks = 16 blocks
Answer:
16 paving stones
Step-by-step explanation:
1 m = 100 cm
The square has sides 200 cm long
Its area is 200(200) = 40000 sq cm
Each paving stone has an area of 50(50) = 2500 sq cm
So 40000/2500 = 16 paving stones
