Answer:6/12
Step-by-step explanation:
7x + 2 = -19 (b) 3x - 1/3 = 5 (c) 5x - 4 = 21 (d) -7x = 21 (e) 18 - 7x = -3 (f) 3(x + 4) = 21 (g) 3x - 9 = 5x - 3 (h) 4x + 6 - 7x + 9 = 18 (i) - 4/9 x = - 36 (j) -7/8x - 6 = 8 can any please elp me find the variables in the question
Answer:
Step-by-step explanation:
a)7x + 2 = -19 {subtract 2 from both sides}
7x + 2 - 2 = -19 - 2
7x = -21 {Divide both sides by 7}
7x/7 = -21/7
x = -3
b) 3x - 1/3 = 5
3x - 1/3 +1/3 = 5 + 1/3 {Add 1/3 to both sides}
3x =15/3 + 1/3
3x =16/3
3x/3 = 16/3*3 {Divide both sides by 3}
x =16/9
x =1 7/9
c) 5x - 4 = 21
5x -4 + 4 = 21 +4 {Add 4 to both sides}
5x = 25
5x/5 = 25/5 {Divide both sides by 5}
x = 5
d) -7x = 21 {Divide both sides by -7}
-7x/-7 = 21/-7
x = -3
e) 18 - 7x = -3
18 - 7x - 18 = -3 - 18 {Subtract 18 from both sides}
-7x = -21 {Divide both sides by -7}
-7x/-7 = -21/-7
x = 3
f) 3(x+4) = 21 {use distributive property}
3x + 3*4 = 21
3x + 12 = 21
3x + 12 - 12 = 21 - 12 {Subtract 12 from both sides}
3x = 9 {Divide both sides by 3}
3x/3 = 9/3
x = 3
g) 3x - 9 = 5x - 3 {add 9 to both sides}
3x - 9 + 9 = 5x - 3 + 9
3x = 5x + 6
3x - 5x = 5x + 6 - 5x { subtract 5x form both sides}
-2x = 6 {Divide both sides by -2}
-2x/-2 = 6/-2
x = -3
h) 4x + 6 - 7x + 9 = 18 {Add the like terms}
-3x + 15 = 18 {Subtract 15 from both sides}
-3x + 15 -15 = 18 - 15
-3x = 3 {Divide both sides by -3}
-3x/-3 = 3/-3
x = -1
[tex]i) \frac{-4}{9}x = -36[/tex]
Multiply both sides by 9
[tex]9*\frac{-4}{9}x =9*-36[/tex]
-4x = -324 {Divide both sides by -4}
-4x/-4 = -324/-4
x = -81
[tex]j)\frac{-7}{8}x - 6 = 8[/tex] {Add 6 to both sides}
[tex]\frac{-7}{8}x-6+6=8+6\\\\\frac{-7}{8}x=14\\[/tex] {Multiply both sides by 8}
[tex]\frac{-7}{8}x*8=14*8\\\\-7x=14*8\\[/tex] {Divide both sides by -7}
[tex]\frac{-7}{-7}x=\frac{14*8}{-7}[/tex]
x =-2*8
x = -16
what do the following two equations represent? 4x+2y=10 and 4x-2y=-10
they represent linear equations
The two equations, 4x + 2y = 10 and 4x - 2y = -10, represent a system of linear equations.
Why is this so?The equations are written in standard form, where x and y are variables, and the coefficients 4, 2, -10, and -2 are constants. Each equation represents a linear relationship between x and y.
The coefficients in front of x and y determine the slope of the line, and the constants on the right side of the equations determine the y-intercept.
Solving this system of equations simultaneously can determine the values of x and y that satisfy both equations, representing the point(s) where the two lines intersect, if they intersect at all.
Learn more about linear equations. at:
https://brainly.com/question/2030026
#SPJ2
What expression has a positive value
I need help and I need explanation plz
Answer:
20 counters.
Step-by-step explanation:
50/200 or 1/4 of the counters have white paint on them.
That means you can expect 1/4 of the 80 counters pulled out to have white paint on them or 20 counters.
is 262015 divisible between 4?
Answer:
No
Step-by-step explanation:
The formula for the slant height of a cone is t equals StartFraction S minus pi r squared Over pi EndFraction. , where S is surface area of the cone. Use the formula to find the slant height, l, of a cone with a surface area of 500π ft2 and a radius of 15 ft.
Answer:
275 ft
Step-by-step explanation:
The formula given to use for the slant height l of the cone is ;
l = (s - πr^2)/π
Now substituting the parameters given in the question, 500 π for area and radius of 15, we have
l = {500π-15^(2)π}/π
l =( 500 π -225 π)/π
l = 275 π/π
l = 275 ft
Answer:
275
Step-by-step explanation:
^ and what they said
Two hikers start a trip from a camp walking 15 miles due east. They turn north and walk 17 miles to a large pond. How far is the pond from base camp to the nearest tenth of a miles.
Answer:
22.7 miles
Step-by-step explanation:
The hikers start walking 15 miles due east and then they turn north and walk 17 miles to a large pond.
The shape of their journey can be represented as a right angled triangle, shown below.
To find the distance between the pond and the base camp, we need to find the hypotenuse of the triangle.
We can do this by using Pythagoras theorem:
[tex]hyp^2 = a^2 + b^2[/tex]
where a and b are the other two sides of the triangle. Therefore:
[tex]hyp^2 = 15^2 + 17^2\\\\hyp^2 = 514\\\\hyp = \sqrt{5`4} \\\\hyp = 22.7 miles[/tex]
The pond is 22.7 miles far from the base camp.
The graph below shows the relationship between population density and pollution per person for 36 Japanese cities.
What is the best description of this relationship?
Choose 1 answer:
Choose 1 answer:
(Choice A)
A
Positive linear association
(Choice B)
B
Negative linear association
(Choice C)
C
Nonlinear association
(Choice D)
D
No association
Graph:
Answer: D . No association
Step-by-step explanation:
The relationship between two variable is called correlation.
When two variables has positive correlation ( When one variable increases by increasing the other) then it reprsesents Positive linear association .When two variables has negative correlation ( When one variable decreases by increasing the other) then it reprsesents Negative linear association .When two variables in which change in one variable does not correspond with constant change in the other variable, then it represents Nonlinear association.If two variables are not interdependent such that if one increasing then there is no proportional change in the other variable, then we say there is no correlation.Hence, the correct option is D. No association.
Hi There. (Choice D) Is The Right Answer.
Step-by-step explanation:
PLZ HELP ME W DIS!!!
Answer:
6^8
Step-by-step explanation:
When the equation looks like this, you can multiply the exponents to give you 6^8. I think that's the kind of answer you're looking for :)
Hope this helps you!
Maths * Henry is mixing concrete. To make concrete he needs to mix cement, sand and gravel in the ratio 4 : 3 : 1 by weight. Henry needs to make 120kg of concrete. He has 55kg of cement, 45kg of sand and 15kg of gravel. Which ingredient is Henry short of?
Answer:
His 55 kg of cement is 5 kg short of the 60 kg he needs.
Step-by-step explanation:
Let r be a ratio useful in determining how much of each ingredient Henry needs:
4/8 of the mix is cement, 3/8 is sand and 1/8 is gravel.
4/8 of the total 120 kg must then be 60 kg made up of cement;
3/8 must then be 45 kg made up of sand; and
1/8 must then be 15 kg made up of gravel
His 55 kg of cement is 5 kg short of the 60 kg he needs.
Convert 11.7 cm3 into ml
Answer:
11.7
Step-by-step explanation:
1 Cubic centimeter (cm3) is equal to 1 milliliter (mL). 1 Liter is equal to 1 cubic decimeter and there are 1000 cubic centimeters in a cubic decimeter, that makes 1 cubic centimeter equals to 1 milliliter.
In a group of 17 pupils, 2 play the flute only. 11 play the piano only. 1 plays neither instrument. A student is selected at random. What is the probability the student plays both instruments?
Answer:
6
Step-by-step explanation:
idk
What is x? Im having trouble
Answer:
These are two secant lines meaning we can use theorem 6-17 to find the value of x: 6x + 8x times 8x = 16 times 7
14x times 8x = 112
112x^2 = 112
x^2 = 1
x = 1
Answer:
x=1
Step-by-step explanation:
(whole secant) x (external part) = (whole secant) x (external part)
(9+7) *7 = (6x+8x)*8x
16*7 = 14x*8x
112 =112 x^2
Divide by 112
112/112 = 112x^2/112
1 = x^2
Take the square root
1 =x
Внешний диаметр полого шара равен 16 см. Толщина стенок 2 см Найти
объем материала, из которого изготовлен шар.
Answer:
Внешний радиус
Тогда внутренний радиус
Объем материала равен разности объемов внешнего и внутреннего шаров, то есть
Answer:
1239.25 cm³
Step-by-step explanation:
Outer diameter 16 cm
⇒ R= 8 cm
Inner radius
⇒ r= R- 2= 6 cm
The volume of the wall of 2 cm thickness:
⇒ 4/3πR³- 4/3πr³= 4/3*3.14*(8³-6³)= 1239.25 cm³
A farmer has 3000 feet of fencing to use on a new enclosure. The new enclosure will go up against existing fencing so one side does not need additional fencing. If the farmer wants to subdivide the enclosure to have 3 pens, what is the maximum total area the farmer can enclose?
Answer:
375000 ft^2
Step-by-step explanation:
From the statement that we have that it would be 1 time the length and 2 times the width because one side is not necessary and also we must take into account that it would be divided by 3 equal enclosures therefore we will use 1000 feet (3000/3) so Therefore, the perimeter would be equal to:
1000 = l + 2 * w
we solve for w:
l = 1000 - 2 * w
Also the area is equal to:
A = w * l
replacing:
A = w * (1000 - 2 * w)
A = 1000 * w - 2 * w ^ 2
We derive:
A '= 1000 - 4 * w
Let's equal 0:
1000 - 4 * w = 0
w = 1000/4
w = 250
replacing and we calculate l:
l = 1000 - 2 * 250
l = 500
A = 250 * 500
A = 15,000 ft ^ 2
Which means that for each subdivision the maximum area would be 125000 square feet and the total would be:
125000 * 3 = 375000 ft ^ 2
Kelly invested her savings of $4800. she invested part in mutual funds, at 9% per year, and the rest in GIC's, at 10% per year. at the end of the year, the interest from both investments is $457. how much did she invest at each rate?
Answer:
For the 9% she invested $2,300
For the 10% she invested $2,500
Step-by-step explanation:
Let the amount invested be $x and $y in both cases respectively
Since the total invested is $4,800
This means that;
x + y = 4800 ••••••••••••(i)
Now let’s have a look at the interests.
For the 9%
Interest would be 9/100 * amount invested
= 9/100 * x = 9x/100
For the 10%, interest would be
10/100 * y = 10y/100
Adding both will give a total of 457
9x/100 + 10y/100 = 457
multiply through by 100
9x + 10y = 45700 •••••••• (ii)
From equation i, we can write x = 4800 - y
we can substitute this into the second equation
9(4800-y) + 10y = 45700
43200 -9y + 10y = 45,700
43200 + y = 45,700
y = 45,700-43,200 = $2,500
Recall
x = 4800 -y
so x = 4800 -2500 = 2300
You are driving to visit a friend in another state who lives 440 miles away. You are driving 55 miles per hour and have already driven 275 miles. Write and solve an equation to find how much longer in hours you must drive to reach your destination. A. 55h + 275 = 440 ; h=3 B.55h - 275 = 440 ; h= 13 C.440h -275 = 55 ; h =0.75 D. 55h +275h = 440 ; h=1.3
Answer:
A. 55h + 275 = 440; h=3
Step-by-step explanation:
Since all answer choices have a different H= , finding how many hours you have left to drive will give you the right answer.
You've already driven 275 miles in your 440 mile trio so you can subtract the 275 to find out how much you will still need to drive.
440 - 275 = 165
You already know that you are driving at 55 mph so divide 165 by 55 and the answer is three.
Option A was the only answer choice which listed h=3 so that is the correct answer.
1 3/4 x 4 1/6 whats answer
Answer:
7 7/24
Step-by-step explanation:
first put the wholes inside the fraction:
[tex]1 \frac34 = \frac44 + \frac34 = \frac74[/tex]
[tex]4 \frac16 = \frac{24}{6} + \frac16 = \frac{25}{6}[/tex]
Then multiply numerator times numerator, denominator times denominator and take out wholes again:
[tex]\frac74 \times \frac{25}{6} = \frac{7 \times 25}{4 \times 6} = \frac{175}{24} = 7 \frac{7}{24}[/tex]
Here’s a graph of a linear function. Write the equation that describes that function. Express it in slope-intercept form.
Answer:
y=1/3x-3
Step-by-step explanation:
slope = (y2-y1)/(x2-x1)
Use the two points: (0,-3) (3,-2)
slope = (-3+2)/(0-3)
slope = -1/-3 = 1/3
y intercept = -3
Equation: y=1/3x-3
The proceeds of a $7,500.00, 10 percent simple discounted note for 85 days is
Answer:
7325.34
Step-by-step explanation:
Suppose that for some function g,
g(x+4)= 7x + 2. Find g(-3).
Help i don’t understand
Solve: [4x + 2] + 6 =0
Select one
a. no solution
b. -1 or 2
O c. 1 or-2
o d. all real numbers
Answer:
Given
Step-by-step explanation:
4x+2+6=0
4x+2=-6
4x= -6-2
4x= -8
x = -8/4
= -2
Answer:
x = -2
Step-by-step explanation:
[4x + 2] + 6 =0
Combine like terms
4x+ 8 =0
Subtract 8 from each side
4x+8-8 = 0-8
4x = -8
Divide each side by 4
4x/4 = -8/4
x = -2
Move values into the boxes to create an equation that represents "8 times h 24."
h
8
16
24
32
Answer:
0+8
Step-by-step explanation:
add 8 each time
it is 0 because in times table if you have 8, 16 and 24 then you don't need to add it on or take away from it, so it will be 0.
I hope that helped.
Ricky Major
3:05 AM (0 minutes ago)
to me
Fred is planning a fundraiser where he will collect $4.50 for every mile he runs. He will be running on a typical track, that has two straight lengths of 300 feet each, and two curved parts that are in the shape of semicircles with 200 foot diameters
He runs around the track exactly 15 times. To the nearest cent, how much money did he collect?
Answer:
Step-by-step explanation:
The diameter of each curved path is 200 feet. Since the two curved semi circular paths are equal, they would form a circle. It means that the distance around the two semi circular paths would be the circumference of the circle. Formula for determining the circumference of the circle is π × diameter. It becomes
200 × 3.14 = 628 feet
Total distance around the track would be
300 + 300 + 628 = 1228 feet
5280 feet = 1 mile
1228 feet = 1228/5280 = 0.23 mile
If he runs around the track exactly 15 times, it means that the number of miles covered is
0.23 × 15 = 3.45 miles
Since he will collect $4.50 for every mile he runs, the amount of money that he collected is
4.5 × 3.45 = $15.5
asssssapppp please need it now
Solution,
Volume of the prism= l*b*h
=1 1/2*8*2 1/2
= 3/2*8*5/2
= 30 cubic units
Hope it helps
Good luck on your assignment
Sin (7 pi/6) = ____?? Help
Answer:
-0.5 or -1/2 or A
Step-by-step explanation:
180 degrees is Pi radians. To find out what the measure is in the paranthesees, divide 180 by 6 and get 30. Now multiply it by 7 to get 210. The question is asking for the sin(210). The sin of 210 is -0.5
What is the value of the expression i To the power of 1 times I to the power of 2 times I to the power of 3 times I to the power of 4
Answer:
-1
Step-by-step explanation:
[tex]i^1\cdot i^2\cdot i^3\cdot i^4= \\\\i^{1+2+3+4}= \\\\i^{10}= \\\\-1[/tex]
Hope this helps!
Solve for x
6(x - 1) = 9(x + 2)
O x= -8
O x= -3
0 x = 3
0 x = 8
Answer:
[tex]A.x=-8[/tex]
Step-by-step explanation:
A gym’s membership in 2010 was 8,700. Now, it is 6,400. Which expression equals the percent of change?
Find the area of the compound shapes below !Please help
Answer:
86cm
Step-by-step explanation:
Answer:
Step-by-step explanation:
the first figure is rectangle , so
length = 15cm, breadth = 6cm
therefore area = l * b = 15*6 = 90cm^2
second figure is also a rectangle so,
length = 12+6 =18 cm ( or 9+9) , breadth = 9cm
therefore area = l*b =18*9 = 162cm^2
third figure is a semicircle , so
d = 11+9 = 20 cm , r = d/2 =20/2 =10cm
area of semicircle = [tex]1/2[/tex] * [tex]\pi * r^2\\[/tex]
=1/2*22/7 *10*10
=1100/7 = 157 1/7 cm^2
if you add all the areas then you will get the requires area
hope it helps you