Kat has 19 coins, all quarters and dimes, that are worth a total of $4. The system of equations that can be used to find the number of quarters, q, and the number of dimes, d, she has is shown.
q + d = 19
0.25q + 0.1d = 4
How many quarters does she have?
4
5
14
15
Answers
Answer:
I'm terrible at explaining so here's a screenshot
- Ripper
Step-by-step explanation:
The number of the quarters coins are 14. Then the correct option is C.
What is the solution of the equation?The solution of the equation means the value of the unknown or variable.
Kat has 19 coins, all quarters and dimes, that are worth a total of $4.
The system of equations that can be used to find the number of quarters, q, and the number of dimes, d, she has is shown.
q + d = 19
d = 19 – q ...1
0.25q + 0.1d = 4 ...2
Solve the equation, we have
0.25q + 0.1(19 – q) = 4
0.25q – 0.1q + 1.9 = 4
0.15q = 2.1
q = 14
Then the correct option is C.
More about the solution of the equation link is given below.
https://brainly.com/question/545403
#SPJ2
Related Questions
Please tell me the answer if you know I really need help
Answers
Answer:
The slope is 6/10
Step-by-step explanation:
Slope is equal to the change in y over the change in x. In this case the change in x was 60 and the change in y was 100.
Lets Solve!
change y/ change x
Substitute the change in y and change in x.
60/100
Simplify
6/10
The slope is 6/10
PLEASE HELP ME WITH THIS QUESTION!!
Answers
Answer:
+$90;
$1,600
Step-by-step explanation:
The equation, [tex] y = 1600 + 90x [/tex], given to us tells us much about the situation described above.
y = total pay
x = number of copies of Math is fun
1600 = y-intercept, that is the starting value or the pay he gets only if Sam sold 0 copy of Math is fun. That is, when x = 0, y = 1,600.
90 = unit rate or the change in the total pay for each copy of Math is fun that Sam sells.
Therefore, our answers would be:
+$90, and $1,600
Who wants to be my gamergirl
Answers
Answer:
Well I'm not a girl soo No.
Step-by-step explanation:
Hello, please, I need the answers!! Each year a school booster club holds a dance to raise funds. In the past, the profit of the club makes after paying for the bank and other costs has been modeled by the function p(t) = -16t^2 - 800t - 4000 where t represents the ticket price in dollars. a. What ticket price gives the maximum profit? b. What is the maximum profit? c. What ticket prices would generate a profit of $5000?
Answers
Answer:
Step-by-step explanation:
Given the profit a club makes after paying for the bank and other costs modeled by the function
p(t) = -16t^2 - 800t - 4000
t is the ticket price
The maximum profit occurs when dp/dx = 0.
dp/dx = -32t-800
since dp/dx
0 = -32t-800
32t = -800
t = -800/32
t = - 25
Hence ticket price gives the maximum profit is $-25
b) to get the maximum profit, substitute t = -25 into the modelled function
p(t) = -16t^2 - 800t - 4000
p(-25) = -16(-25)² - 800(-25)- 4000
p(-25) = -10000+20000-4000
p(-25) = 6000
Hence maximum profit is $6000
c) To get the ticket prices would generate a profit of $5000, we will substitute p(t) = 5000 and find t
p(t) = -16t^2 - 800t - 4000
5000 = -16t^2 - 800t - 4000
-16t^2 - 800t - 4000 -5000 = 0
16t^2 + 800t + 9000 = 0
Answer:
Step-by-step explanation:
Given the profit a club makes after paying for the bank and other costs modeled by the function
p(t) = -16t^2 - 800t - 4000
t is the ticket price
The maximum profit occurs when dp/dx = 0.
dp/dx = -32t-800
since dp/dx
0 = -32t-800
32t = -800
t = -800/32
t = - 25
Hence ticket price gives the maximum profit is $-25
b) to get the maximum profit, substitute t = -25 into the modelled function
p(t) = -16t^2 - 800t - 4000
p(-25) = -16(-25)² - 800(-25)- 4000
p(-25) = -10000+20000-4000
p(-25) = 6000
Hence maximum profit is $6000
c) To get the ticket prices would generate a profit of $5000, we will substitute p(t) = 5000 and find t
p(t) = -16t^2 - 800t - 4000
5000 = -16t^2 - 800t - 4000
-16t^2 - 800t - 4000 -5000 = 0
t^2 + 50t + 562.5= 0
Factorize
-50±√2500-4(562.5)/2
t = -50±√2500-2250)/2
t = -50±15.81/2
t = -65.81/2 and -34.19/2
t = -32.91 and -17.09
can you help me again UwU
Answers
Answer:
Upper Left
Bigger slopes means steeper lines.
Good luck!
i don’t understand this question at all, help?
Answers
WOULD THIS BE RIGHTTT PLEASE NO BS
Answers
Answer:
no its not right
the line doesn't pass by (2,0) it passes by (2,1)
Pleas help me with this question im confused and I hate math
Answers
Answer:
its 2
Step-by-step explanation:
When given a table, what operations do you use to determine the slope of the graph?
Group of answer choices
Subtraction
Division
Both A & B
None of the Above
Answers
Answer:
division
Step-by-step explanation:
Draw and solve
3. You sight a rock climber on a nearly vertical cliff at a 32° angle of elevation. The horizontal ground distance to the base of the cliff is 1,000 ft. Find the line-of-sight distance to the rock climber.
Answers
Answer: 58 degrees
Step-by-step explanation:
Solve the following system by substitution.
22.
X + 2y = 0
-3-4=-2
4y = -2
A (2, -1)
B. (2, 1).
C. (4, -1)
D. (-2, -1)
Answers
Answer:
D
Step-by-step explanation:
surely and i think it's correct
Answer:
D is the correct answer
Step-by-step explanation:
if there are 3 friends with 80 brothers each, and the brothers each have 25 sisters, and those sisters had 83 dogs. How many people are ded?
Answers
Answer:
it never said how many people died, so 0, because if they lived long enough as together with 80 brothers, plus 25*80 sisters, then no one dies exept the mothers womb and the parents bank account
Step-by-step explanation:
Compare the pair of fractions. Use < =, or >
2 3/4 ____ 2 4/6
Answers
Answer:
2 3/4 > 2 4/6
Step-by-step explanation:
Answer:
2 3/4 < 2 4/6
Step-by-step explanation:
brainlist plz thx
What is the value of 43 ?
O 12
O 16
O 43
O 64
Answers
Answer:
64
Step-by-step explanation:
Answer: Your answer is 64 4 times 4 equals 16 then 16 times 4 equals 64 <3
Step-by-step explanation:
Hey guys! Can you simplify this? Be sure to show your work so i know you aren't guessing! Also remember when you answer a question and your answer gets reported and deleted you lose the points you received! So don't put incomplete, absurd, plagiarism answers!
3(x-4)>15
Answers
Answer:
x>9
Step-by-step explanation:
x−4>
3
15
x−4>5
x>5+4
x>9
PLSSSS HELP ME I WILL GIVE BRAINLY
Answers
What is an equation of the line that passes through the points (1,8) and (-1, -2)?
Put your answer in fully reduced form.
Answers
Answer:
y=5x+3
Step-by-step explanation:
First, we need to find the slope. Remember that the slope equation is [tex]m=\frac{y2-y1}{x2-x1}[/tex].
If we plug in the given points we get m=5. (let me know if you need further elaboration on this step)
So now that we have a slope, we can plug it into the slope-intercept equation.
y=mx+b
y=5x+b
We still need to find b (y-intercept), but luckily, we were given two points that we could plug in. I'm going to use (1,8) here.
8=5(1)+b
8=5+b
b=3
Now we have all of our parts and can put them into the equation.
y=5x+3
Hope this helped!
Qual a altura máxima atingida por um projétil cuja trajetória pode ser descrita pela função: h(x) = –4x² + 5, sabendo que h é a altura do projétil e que x é a distância percorrida por ele, em metros?
A))5
B))6
C))7
D))8
E))9
Answers
Answer:
A altura máxima é 5
Step-by-step explanation:
Matematicamente, a altura máxima pode ser obtida
A altura máxima é simplesmente o vértice da parábola
Começamos diferenciando a função Isso será -8x
Agora, defina -8x como 0
Isso significa que x = 0
Agora, substitua x = 0 de volta na equação temos
f (0) = -4 (0) ^ 2 + 5
f (0) = 5
A altura máxima é 5
Find the sales tax.
Sales Tax
Selling Price Rate of Sales Tax Sales Tax
$10.00
5%
?
The sales tax is $
Enter your answer in the answer box and then click Check Answer
Answers
Answer:
$0.5
Step-by-step explanation:
10*0.05 = 0.5 dollars
Answer:
.50
Step-by-step explanation:
Selling price x sales tax rate = sales tax
10 x .05 (5%) = .50
1. Estimate twenty-nine percent of forty-eight. Please again no decimal form!
2. Estimate sixty-two percent of one hundred twenty-four. no decimal form please!
3. WORK Karl made $365 last month doing odd jobs after school. If 75% of the money he made was from doing yardwork, about how much did Karl make doing yardwork?
Answers
[tex]\boxed{29\;percent\;of\;48=(?)}[/tex]
What is the area of the above trapezoid? Please help
I will cash app if you help out
Answers
Answer:
b should be correct
Step-by-step explanation:
no need to cash app me its been a while since ive done math so i dont even know if this is right
Plz help don’t understand this question and I got it wrong an i have to redo it
Answers
Answer:
its B
Step-by-step explanation:
Write a system of equations with the solution (4,-3). Show your work.
Answers
Answer:
4x4 then dived by 8you will get 4x4=16 dived by 8=8
Mary bought a shirt on sale for $15.00. The sales tax was 10%. If Mary paid with a $20 bill, what was her change?
A-$4.90
B-$5.00
C-$3.50
D-$1.50
Answers
Answer:
Her change was: $3.5
Step-by-step explanation:
Mary bought a shirt on sale for $15.00.
As the sales tax was 10%.
i.e. 10/100 × 15 = $1.5
so the sales tax on $15.00 was $1.5.
Hence, the total cost Mary had to pay to buy the shirt was:
$1.5 + $1.5 = $16.5
As Mary paid with a $20 bill, therefore the change can be calculated as
20 - 16.5 = $3.5.
Therefore, her change was: $3.5
let f(x)=4^x. The new function g(x)=f(x-1)+3 represents transformations that were made to function f. Type the new equation for g. g(x)=___
Describe the two types of transformations that occur between function f and function g. (use words like up, down, left, right, compression or stretch in your answer.)
Answers
Answer:
g(x) = [tex]4^{(x-1)}+3[/tex]
Step-by-step explanation:
Given exponential function is,
f(x) = [tex]4^{x}[/tex]
If the given function is shifted 1 unit to the right,
h(x) = f(x - 1)
= [tex]4^{(x-1)}[/tex]
If the function 'h' is shifted 3 units up,
g(x) = h(x) + 3
= [tex]4^{(x-1)}+3[/tex]
Therefore, transformed function will be,
g(x) = [tex]4^{(x-1)}+3[/tex]
How do you solve for this ?
Answers
Circle A has a radius of 6 inches. Circle b has a radius 20% greater than circle A. What is the radius of circle B?
Answers
Answer:
7.2inches.
Step-by-step explanation:
Given parameters:
Radius of Circle A = 6inches
Unknown:
Radius of circle B = ?
Solution:
We are to find the radius of circle B.
The relationship between circle A and B is such that;
Radius of Circle B = 20% greater than that of A
Radius of Circle B = 1.2 x 6 = 7.2inches.
Write the decimal as a fraction or mixed number in simplest form.
9.75
Answers
✨Answer:✨
9 3/4 (simplest form)
✨Step-by-step explanation:✨
1. Convert decimal into fraction:
9.75 = 975/100
2. Simplify:
975/100 = 39/4 = 9 3/4
A. Reduce fraction to lowest terms (25 is the greatest common divisor of 975 and 100. Reduce by dividing both numerator and denominator by 25):
975/100 = 975 ÷ 25 = 39/4
100 ÷ 25
B. Convert improper fraction to mixed number:
39/4 = 9 3/4
(39 ÷ 4 = 9 remainder 3)
8) What is the image of point (-3,7) after a reflection in the
origin?
1) (3,7)
2) (-3,-7)
3) (3,-7)
4) (7,-3)
Answers
Answer:
(3,7)
Step-by-step explanation:
4x + 6y - z=-18
3x +2y - 4z = -24
- 5x + 3y + 2z = 15
find x y and z
Answers
Answer:
x = -2, y = -1, z = 4
Step-by-step explanation:
4x + 6y - z=-18
z = 18 + 4 x + 6 y
3x +2y - 4z = -24
z = 6 + (3x)/ 4 + y /2
- 5x + 3y + 2z = 15
z = 15/2 + (5x)/2 - (3y)/2
18 + 4 x + 6 y = 6 + (3x)/ 4 + y /2 = 15/2 + (5x)/2 - (3y)/2
x = -22y/13 - 48/13
4(-22y/13 - 48/13) + 6y - (15/2 + (5(-22y/13 - 48/13))/2 - (3y)/2) = -18
Compute the output value of the variables x and y with respect to the input values of x, y, and z coefficients.