Keiko purchased a prepaid phone card for $20 . Long distance calls cost 16 cents a minute using this card. Keiko used her card only once to make a long distance call. If the remaining credit on her card is $17.28 , how many minutes did her call last?
Answer:
17 minutes
Step-by-step explanation:
To answer this question, all we have to do is subtract the original amount of money on the phone card by what is remaining after Keiko's call:
20 - 17.28 = 2.72
Now, we divide this number by 0.16:
2.72 / 0.16 = 17
So, Keiko's call lasted 17 minutes
Hope this helps :)
Given f(x) = 5x – 3, solve for x when f(x) = 7.
Answer:
x=2
Step-by-step explanation:
7=5x-3
10=5x
2=x
x=2
Please help!!!
What is different about the solutions to an inequality (like r > -3) with that of an equation (like
= 2)?
When an answer to a question uses the greater than symbol, that means any number above the number used is a possible answer to the equation. However, when it's just a simple "x = 2", then 2 is the only possible answer to that equation. Think about it as if it were on a graph. In the attached file I have a graph that is displaying the equation "x > 4". The entire shaded area to the right of 4 could be a possible answer.
Hope this helps.
what is 3.68 divided by 17 oz. and 2.89 divided by 13 oz.
Answer:
0.21 and 0.22
Step-by-step explanation:
What is the value of x in the equation 2x + 3y = 36, when y = 6?
8
9
027
36
Answer:
x = 9.
Step-by-step explanation:
The first step I did was replace y with 6.
[tex]2x+3\cdot \:6=36[/tex]
I multiplied 3*6 next.
[tex]2x+18=36[/tex]
Then I subtracted 18 from both sides of the equation.
[tex]2x+18-18=36-18[/tex]
After, I simplified the equation.
2x=18
Divided the both by 2 and then simplified again to get...
[tex]\frac{2x}{2}=\frac{18}{2}[/tex]
[tex]x=9[/tex]
So [tex]x=9[/tex].
1. Write 4 equivalent fractions of each of the following:
(i) ³/₄
(ii) ⁴/₅
(iii) ⁶/₇
(iv) ⁴/₆
Answer:
(i) ³/₄ - 6/8, 9/12, 12/16, 15/20
(ii) ⁴/₅ - 8/10, 12/15, 16/20, 20/25
(iii) ⁶/₇ - 12/14, 18/21, 24/28, 30/35
(iv) ⁴/₆ - 8/12, 12/18, 16/24, 20/30
Step-by-step explanation:
write an equation that represents the line. Use exact numbers.
Step-by-step explanation:
Hey there!
The point shows the coordinates of (-2,1) and (4,6).
Now, When two points are given on a st.line, we use double point formula.
So, use formula;
[tex](y - y1) = \frac{y2 - y1}{x2 - x1} (x - x1)[/tex]
Put all values of x and y coordinates.
[tex](y - 1) = \frac{6 - 1}{4 + 2} (x + 2)[/tex]
Simplify it.
[tex](y - 1) = \frac{5}{6} (x + 2)[/tex]
[tex]y = \frac{5}{6} x + 2 \times \frac{5}{6} + 1[/tex]
[tex]y = \frac{5}{6} x + \frac{ 8}{3} [/tex]
Therefore, the equation of a line is y= 5/6x+8/3.
Hope it helps...
how do i find thedegree of a pollygon????
Answer:
Not sure what you mean, but I'm assuming you're referring to the sum of all the interior angles of a polygon. In that case:
Total sum of interior angles of a polygon ->
[tex]{180(n-2)[/tex]
However, if you are looking for the degrees of each interior angle, you must divide the total interior angle degrees by the amount of sides on the polygon, n
Degree of each interior angle of a polygon ->
[tex]\frac{180(n-2)}{n}[/tex]
In both cases, n represents the amount of sides the polygon has.
Help, please!
Explain how to multiply two numbers with different signs.
(This is not a multiple-choice question)
Answer:
multiply the magnitudes of the numbers; affix a negative sign.
Step-by-step explanation:
The product of a positive number and a negative number is the negative of the product of their numerical values.
For example, ...
(2)(-3) = -(2×3) = -6
(-2)(3) = -(2×3) = -6
Answer:
Whenever you multiply two numbers with different signs, the answer is always NEGATIVE.
B. Between what 2 integers the square root of the numbers can be found.
1. 23 2. 113 3. 339 4. 640 5. 75
Factor with the distributive pro
Apply the distributive property to factor out the greatest common factor.
32+44
The greatest common factor is 4.
Step-by-step explanation:
What is 28196−−−√ written in simplified radical form?
Answer:
167.9166459
Step-by-step explanation:
Write an algebraic expression to model the unknown number problem.
the product of a number and fifteen
A 1-column table with 5 rows. Column 1 is labeled Multiplication Words with entries double, multiply, product, twice, times.
Which statements are true? Select that all apply.
You can replace ‘a number’ with a variable to represent an unknown value.
The product means the result of adding two numbers.
Product means the result of multiplying two numbers.
The coefficient is 15.
In algebraic notation, you can represent the product of a number and a variable by writing the number and variable next to each other.
Answer:
A. You can replace ‘a number’ with a variable to represent an unknown value.
C. Product means the result of multiplying two numbers.
D. The coefficient is 15.
E. In algebraic notation, you can represent the product of a number and a variable by writing the number and variable next to each other.
Step-by-step explanation:
EDGE 2020
The algebraic expression to model that "the product of a number and fifteen" is 15x, where x represents the unknown number. The statements A, C, and D are true.
What is the algebraic expression?Algebraic expressions are mathematical statements with a minimum of two terms containing variables or numbers.
The algebraic expression to model the unknown number problem "the product of a number and fifteen" is 15x, where x represents the unknown number.
From the given options, the following statements are true:
A. You can replace ‘a number’ with a variable to represent an unknown value.
C. Product means the result of multiplying two numbers.
D. The coefficient is 15.
B. is false because the product means the result of multiplying two numbers, not adding them.
E. is not necessarily true for all cases. The product of a number and a variable can be represented in different ways depending on the context and convention, such as using a dot or parentheses.
Learn more about the algebraic expression here :
brainly.com/question/21751419
#SPJ3
help due in an hour!!
To find m, we can use the formula y2 - y1 / x2 - x1
x1 = 2
y1 = 50
x2 = 4
y2 = 90
Let's plug these numbers into our formula.
m = 90 - 50 / 4 - 2 = 40/2 = 20
So far our equation looks like: y = 20x + b
Now, let's plug one of the points into our equation.
50 = 20(2) + b
Simplify
50 = 40 + b
Subtract 40 from both sides.
10 = b
The final equation is: y = 20x + 10
GIVING BRAINLIEST ASAP - explain why 1 plus 1 equals 2
Put a finger up. You have 1. Add 1 another finger by putting another finger up. If you count how many there are you get 2.
So 1+1 = 2.
Seriously though... why ask this.
Write the equation of the parabola in vertex form.
vertex (0,3), point (1,-4)
f(x) =
Answer:
f(x) = 7x² + 3Step-by-step explanation:
vertex form of an equation of the parabola:
f(x) = a(x - p)² + q
vertex (0, 3) ⇒ p = 0, q = 3
so:
f(x) = a(x - 0)² + 3
f(x) = ax² + 3
the parabola goes through point (1, -4) ⇒ x=1, f(x)=-4
-4 = a(1)² + 3
-4 = a + 3
a = 7
Therefore the equation of the parabola in vertex form:
f(x) = 7x² + 3
z+ 12w when z=8 and w=4
Answer:
56
Step-by-step explanation:
z + 12w when z = 8 and w = 4
~Substitute
8 + 12(4)
~Simplify
8 + 48
~Add
56
Best of Luck!
We are provided with the value of z and w:
z = 8w = 4We have to find the value of z + 12w.....?
Since we have to find the value of the polynomials for the given values of variables. Plug the given values of z and w in the above question:
➝ z + 12w
➝ 8 + 12(4)
➝ 8 + 48
➝ 56
So, the required value of the polynomial is 56.
Carry on Learning [tex]![/tex]
Зn + 16 = 7n help pls
Answer:
n = 4
Step-by-step explanation:
3n + 16 = 7n
Cancel out the 3n by subtracting it from both sides
16 = 4n
Divide both sides by 4 so you are left with n=
4 = n
Answer:
[tex]n=4[/tex]
Step-by-step explanation:
To start off you need to subtract 3n from both sides. That would leave you with:
[tex]16=4n[/tex]
Next, you need to divide both sides by 4, since this equation is equal to [tex]n*4[/tex] and we only want a single n, not multiple. That would give us the answer:
[tex]4=n[/tex]
1.) x, y, and x?
abcdefg
Answer:
x and y vertex is (-2,-9)
and the x-intercept(s): (1,0), (-5,0)
I hope this helps
if you could, feel free to mark me Brainliest it would be much appreciated :D
Answer:
I dont really know
Step-by-step explanation:
What is the answer to 24x + 2y =48 for x
Plzz help it’s simple I’m just stupid
Write a compound inequality that is represented by the graph.
Answer:
x < -7 or x > -4
Step-by-step explanation:
SOMEONE HELP PLEASEEE (the photo is attached <3)
Answer:
C. 25
Step-by-step explanation:
Lets just first do 5-² = .04
So it will look like this
[tex]\frac{1}{1/25}[/tex] To do this all you have to do is flip 1/25 to 25/1 so that you can multiply instead on divide.
It will look like this
.[tex]\frac{1}{1}*\frac{25}{1}=\frac{25}{1}[/tex] = 25
Sorry I took so long hope this helps!!
PLEASE HELP ME I'M HAVING A TERRIBLE DAY AND MY MATH IS DUE IN 2 HOURS AND ALL I NEED IS THIS
Fatima earned an 85 average in her science class. The average is based on 6 tests that she takes over the span of the marking period. On her first four tests she earned an 83, a 78, an 87, and an 80. On her sixth test she scored 8 points more than on her fifth test. Let x be the score Fatima received on her fifth test. Set up an equation using x that models this scenario. Solve the equation and state what Fatima earned on her fifth and sixth tests.
please help me
Answer:
84
Step-by-step explanation:
A bookstore packs 6 books in a box. The total weight of the books 14 1/4 pounds. If each book has the same weight, what is the weight of one book?
Answer:
2.375 or 2 3/8
Step-by-step explanation:
You want to do total weight over total number of items.
14 1/4 / 6 books = 2.375
Answer:
14.25 / 6 = 2.375 or 2 3/8
What are the slope and y- intercept of the linear equation
4x-6y=24
Answer: 7 = 2/3 + (-24/6)
What is the angle pair relationship between angles 6 and 8?
Answer:
Two angles are complementary angles if the sum of their measures is 908.
Each angle is the complement of the other. Two angles are supplementary
angles if the sum of their measures is 1808. Each angle is the supplement of
the other.
Complementary angles and supplementary angles can be adjacent angles
or nonadjacent angles. Adjacent angles are two angles that share a common
vertex and side, but have no common interior points.
Step-by-step explanation:
it easy
solve 4x-3 = 2x+7.
Answer:
x=5
Step-by-step explanation:
4x-3 = 2x+7.
Subtract 2x from each side
4x-2x-3 = 2x-2x+7.
2x-3 = 7
Add 3 to each side
2x-3+3 = 7+3
2x= 10
Divide by 2
2x/2 = 10/2
x = 5
Answer:
x=5
Step-by-step explanation:
4x -3 = 2x +7
Let's start by getting the 2x away from the seven. Subtract the 2x from itself and from 4x. We will subtract 2 because a negative will cancel out the positive.
2x -3 = +7
Now let's get the -3 away from 2x. Add 3 to the -3 and the +7. We will add because a positive will cancel out the negative.
2x = +10
Then divide +10 by 2 to get the final answer.
Winston owns a coffee cart. He charges $3.50 for a cup of coffee, and it costs him $1.50 to make each cup of coffee plus $100 a day for other expenses. Which equation can be used to determine how many cups of coffee, c, that Winston needs to sell each day in order to break even?
Answer:
50 cups of coffee
Step-by-step explanation:
So what you do is take 3.50 then subtract 1.50 to get the profit of one cup of coffee. ($2) Then you do the $100 and divide it by the $2 and find out how many cups of coffee he has to sell to get to the $100. (50)
List the y intercept of this equation: Y=4x+1 *
Can someone pls help me