Answer: 30
Step-by-step explanation:
Example
x=y
x+z=y+z
If we subtract the same number from both sides of an equation, both sides will remain equal.
Example
x=y
x−z=y−z
If we divide both sides of an equation by the same number, both sides will remain equal.
Example
x=y
x÷z=y÷z
If we multiply both sides of an equation by the same number, both sides will remain equal.
x=y
x⋅z=y⋅z
Video lesson
Solve the following expression
4x−7=x3+4
Please help ASAP!!!
Answer:
Cry about it wah wah wahhhhhhhh
Step-by-step explanation:
Anna charges $ 11.50 to babysit per hour . If Anna babysits for 3 hours , she will charge $
Answer:
34.5
Step-by-step explanation:
11.50*3 = 34.5
pls anyone help me im very bat at math
Answer:
[tex]46 - 6 \sqrt{5} [/tex]
Step-by-step explanation:
hope it helped
Write each mixed number as a percent.
1. 2 1/2
2. 9 3/4
3. 4 1/5
4. 7 3/10
Answer:
1. 250%
2. 975%
3. 420%
4. 730%
Hope that helps!
PLEASE HELP
On an algebra test, a total of 50 students had grades of B or C. There were 10 more students with C’s than B’s. Find the number of students who had a B and the number of students who had a C.
Let the students with B(s) be x.
So, the students with C should 10 more than x = x + 10
Total students = 50
=> students with B + students with C = 50
=> x + (x + 10) = 50
=> 2x + 10 = 50
=> 2x = 50 - 10 = 40
=> x = 40/2 = 20
Thus,
students with B = x = 20
students with C = x + 10 = 20+10= 30
Number of students who had a B are 20.
And, Number of students who had a C are 30.
What is an expression?
Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
There are 50 students who had grades of B or C.
There were 10 more students with C’s than B’s.
Now,
Let number of students who had grade B = x
So, The number of students who had grade C = x + 10
So, we can formulate;
x + (x + 10) = 50
x + x + 10 = 50
2x + 10 = 50
2x = 50 - 10
2x = 40
x = 20
Thus, The number of students who had grade B = x
= 20
So, The number of students who had grade C = x + 10
= 20 + 10
= 30
Therefore, Number of students who had a B are 20.
And, Number of students who had a C are 30.
Learn more about the mathematical expression visit:
brainly.com/question/1859113
#SPJ2
Find the value of x.
(Round to the nearest tenth as needed.)
Answer:
x ≈ 12.8
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightEquality Properties
Multiplication Property of EqualityDivision Property of EqualityAddition Property of EqualitySubtraction Property of EqualityTrigonometry
[Right Triangles Only] SOHCAHTOA[Right Triangles Only] tanθ = opposite over adjacentStep-by-step explanation:
Step 1: Define
Angle θ = 58°
Opposite Leg = x
Adjacent Leg = 8
Step 2: Solve for x
Substitute in variables [tangent]: tan58° = x/8[Multiplication Property of Equality] Isolate x: 8tan58° = xRewrite: x = 8tan58°Evaluate: x = 12.8027Round: x ≈ 12.8Help me out please??
A little boy stands on a carousel and rotates around the ride 4 times. If the distance between the litile boy and the center of the carousel is 6 feet, how many feet did the little boy travel?
WILL MARK BRAINLEST
Answer:
[tex] cos(45 - \alpha ) - \sin(45 - \alpha )[/tex]
Answer:
452.16
Step-by-step explanation:
Simple, To the center is 6 and we are trying to find the circumference, So 6 x 6 = 36 then multiply it by pi (3.14) and we get 113.04 and it rotates 4 times so then we need to multiply 113.04 x 4 which is 452.16
Which of the values in the set (2, 3, 4, 5) is a solution to the equation 2x + 4 = 10?
Answer:
3
Step-by-step explanation:
2x+4=10
2(3)+4=10 2*3 = 6
6+4=10
10 = 10
A spider crawls across the floor at two meter per minute. How far can he make it in 5 minutes
Answer:
10 meters
Step-by-step explanation:
Answer:
ten meters
Step-by-step explanation:
2x5=10
10 6 4 15 6 8 6 15 4 find the median range of the data if necessary round to the nearest tenth
Reorder from least to greatest.
4, 4, 6, 6, 6, 8, 10, 15, 15
/\
|
Median is the middle number.
This would be 6.
---
hope it helps
Write the dimensions of a rectangular prism or cube and find the surface area. Explain.
PLEASE HELP ASAP THANKS SO MUCH
(Take the=22/7)
curved surface area of cylinder with diameter 21cm and height 5cm.
Answer:
330cm²
Step-by-step explanation:
CSA of a cylinder = 2πrh
(r = d/2 = 21/2 = 10.5 cm)
Putting the values of 2πrh;
2 x 22/7 x 10.5 x 5
2 x 22 x 1.5 x 5 *(10.5/7 = 1.5)
330 cm²
some one pleas help y=2x+3 y=-2x+15
Answer:
x = 3. y= 9
Step-by-step explanation:
2x +3 = -2x +15
4x = 12
x = 3
y 2(3) + 3 = 9
2x(x+7)-(3x+1) equivalent expression
The diameter of a basketball rim is 18 inches. What is the circumference of the rim?
Find the value of the expression 100 – 10p3 when p = 0
Answer:
Step-by-step explanation:
despacito
Jill has $6 in her purse. She earns $5 by
selling candy, she spends $10 on flowers,
earns $4 by selling cookies, then spends
$3 on ice cream. How much does she
have?
Answer:
income:
6+5+4= 15
expenses:
10+3= 13
15-13= 2 dollars
(a^-3bc^0)^-2/(ab^3c^4)^5
Given f(x)=0.25(6)x, find f−1(x).
Answer:
f−1(x) = [tex]\frac{4x}{6}[/tex]
Step-by-step explanation:
f(x) = 0.25(6)x, find f−1(x).
f(x) = 0.25(6)x
f(x) = [tex]\frac{6}{4}[/tex]x = [tex]\frac{6x}{4}[/tex]
f(x) = y
y = [tex]\frac{6x}{4}[/tex]
Substitute y for an x & x for a y
x = [tex]\frac{6y}{4}[/tex]
Multiply both sides by 4
4( x ) = 4( [tex]\frac{6y}{4}[/tex] )
4x = 6y
Divide both sides by 6 to solve for y
[tex]\frac{4x}{6}[/tex] = y
y = [tex]\frac{4x}{6}[/tex]
so f−1(x) = [tex]\frac{4x}{6}[/tex]
Solve the equations to find the value of the variable using inverse operations.
a.) 4y = 248 b.) c + 2/5 = 2
Answer:
a), y=62 b.) c=1 3/5 or 8/5
Step-by-step explanation:
Okay so these are fairly simple lets start with A
4y=248, all we have to do is divide 4 on both sides
4y/4=y
248/4=62
Pretty Simple
For b just subtract 2/5 from both sides
(c+2/5)-2/5=c
2-2/5=1 3/5 or 8/5
PLEASE HELP IMAGE ATTACHED⚠️⚠️⚠️⚠️⚠️
Answer:
A'(4, -3) ; T'(-1, 4)
Step-by-step explanation:
Multiply the coordinates by 1/2, or divide them by 2 to get the new points.
A(8, -6) ⇒ A'(4, -3)
T(-2, 8) ⇒ T'(-1, 4)
[tex]33 \times 33 \sqrt{3} [/tex]
33x33=1089
---
hope it helps
Answer:
363
Step-by-step explanation:
33x33=1089
[tex]\sqrt[3]{1089}[/tex] = 363
two numbers with a total between 300 and 400
HELP WITH MATH THANKS SO MUCH
Answer:
120 units^2
Step-by-step explanation:
1/2bh
In this scenario rotate the triangle and you get 10 as the base and 24 as the height
1/2*10*24
12*10=120
Answer:
6,240 unit squared is the answer
Which product is greater than 3/4?
Answer:
first one
Step-by-step explanation:
all the others are lower than 3/4 or .75
Put the following equation in Standard Form:
(1/2)x - 4 = (2/3)y
Answer:x=4/3y+8
Step-by-step explanation:
Step 1: Add 4 to both sides.
Step 2: Divide both sides by 1/2.
Answer:
3x-4y =24
Step-by-step explanation:
hope this helped xoxo
Triangle EFG is similar to triangle HIJ. Find the measure of side JH. Round your
answer to the nearest tenth if necessary. Figures are not drawn to scale.
Answer:
JH = 97.9
Step-by-step explanation:
25/12 = x/47
12x = 1175
x = 97.917
A manufacturer is planning to sell a new product at the price of 210 dollars per unit and estimates that if x thousand dollars is spent on development and y thousand dollars is spent on promotion, consumers will buy approximately 160y/(y+4)+170x/(x+7) units of the product.
If manufacturing costs for the product are 130 dollars per unit, how much should the manufacturer spend on development and how much on promotion to generate the largest possible profit?
Round your answer to the nearest dollar.
Development costs: $ ?
Promotion costs: $ ?
Answer:
Development costs: $2757
Promotion costs: $3155
Step-by-step explanation:
This might seem like a two-variable problem, but in actuality it's not - because the demand function is a sum of two components, each being independent and using only one variable, we can solve for the two separately.
Moreover, the price per unit and cost per unit is constant, so each product yields exactly $80 ($210 - $130).
Let's solve separately.
We need to maximize:
$80 * 160y/(y+4) - 1000y = $12800 * y/(y+4) - $1000*y
$80 * 170x/(x+7) - 1000x = $13600 * x/(x+7) - $1000*x
Let's go:
$12800 * y/(y+4) - $1000*y = $12800 * (1 - 4/(y+4)) - $1000y = $12800 - $51200/(y+4) - $1000*y
we analyze the derivative. $12800 is a constant, so we can skip it. Derivative of 1/(y+4) is -(y+4)^-2, derivative of $1000y is $1000.
deriv = $51200/(y+4)/(y+4) - $1000
We find the changepoints by analyzing $51200/(y+4)/(y+4) - $1000 = $0. We don't need to worry about y+4 = 0 because we cannot spend negative money on development/advertisement.
(y+4)^2 = $51.2
y+4 ~= 7.155417528 (or -y-4 = 7.1554... but it doesn't make sense because negative budget so we don't analyze).
y ~= 3.155417528
lastly, we should check that it's actually a maximum there - but it is, the original function goes to negative infinity.
rounding $1000y to the nearest dollar gives us $3155
Let's do the same for x:
$13600 * x/(x+7) - $1000*x = $13600 * (1 - 7/(x+7)) - $1000x = $13600 - $95200/(x+7) - $1000*x
deriv = $95200/(x+7)/(x+7) - $1000
$95200/(x+7)/(x+7) - $1000 = $0
(x+7)^2 = 95.2
(x+7) ~= 9.75704873412
x ~= 2.75704...
rounding $1000x to the nearest dollar yields $2757
What is the percentage of 68