Answer:
x=12, y=-3
Step-by-step explanation:
Plug (-4y) in for x in the top equation. The equation will now read 2(-4y) + 7y = 3. Distribute the 2 into the perenthecies getting: -8y+7y=3. -8+7 is -1 giving -y+3. Divide by -1 making y = -3. Plug -3 back into the top equation and solve for x: 2x + 7(-3)=3. 2x-21=3. 2x=24. x=12.
Marie has 11 coins, all of which are quarters and nickels. In all, they're worth $1.15. How many of each kind of coin does Marie have?
Answer:
Step-by-step explanation:
x + y = 11
.25x + .05y = 1.15
25x + 5y = 115
-25x - 25y = -275
-20y = -160
y = 8 nickels
x + 8= 11
x = 3 quarters
3 quarters and 8 nickels
Write an equation of the line with a slope of 3 and a y-intercept of -7.
Answer:
y=3x-7
Step-by-step explanation:
y=mx+b where m=slope and b=y-intercept
y=3x-7
Which algebraic expression has like terms?
9n7 - 2n+3-4112
7 + 3n-3-672
7n+4n-3m-6n?
612 -4n4+6n-5772
Answer:
the answer is 612 -4n4+6n-5772
The expression that has like terms is (C) 7n+4n-3m-6n.
What is an expression?An expression can be as simple as a single number or variable, or it can be more complex, involving multiple operations and variables.
For example, the expression "3x + 4" contains the variable x, along with the constant values 3 and 4, and the operations of multiplication and addition.
Like terms are terms that have the same variables raised to the same powers.
In the first expression, 9n^7 and -2n have different powers of n, so they are not like terms. The constant term, -4112, is also not like any other term.
In the second expression, 3n and -3 are like terms, as they are both constants with no variables.
In the third expression, 7n, 4n, and -6n are all like terms because they all have the same variable, n, raised to the first power.
In the fourth expression, -4n^4 and 6n have different powers of n, so they are not like terms. The constant term, 612-5772=-5160, is also not like any other term.
Therefore, the expression that has like terms is (C) 7n+4n-3m-6n.
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Simplify the ratio
30:42
• 5/7
•30/42
• 30 to 42
•7/5
A store donated cases of crayons to a daycare center. Each case holds 24 boxes of crayons; each box holds 8 crayons. How many crayons did the center receive?
Answer:
192
Step-by-step explanation:
Just multiply 24 by 8.
I think thats it tho.
Answer:
I think its 192
Step-by-step explanation:
you just do 24 times 8
One third of a number T is equal to 12???
Answer:
1/3×t=12
t=3×12
t=36
Step-by-step explanation:
need thanks for the answer.
which mathematical property is shown here
8+-8=0
1 distributive property
2 inverse property
3 identity property of addition
if f(x)= 6^2 and g(x)=3 +6(x). What is f(2)
Answer:
I,dont know but use M A T H W A Y it will explain with all the stepp by step and answere
Step-by-step explanation:
Write the following expressions in Standard form
-3•2•a+5(7b)+(12•c•4)
are the lines y=x+4 and y=x-2 perpendicular
Answer:
no they are parallel because the slope is the same they just are at different y- intercepts
PLEASE ANSWER what is the solution to -10k +1 <-99 or 10-8k<42
Answer:
Ummmm... Both?
Step-by-step explanation:
66k+9 OR 3(22K+3)
Answer:
k>10
k>-4
Step-by-step explanation:
-10k<-100
k>10
you flip the sign when dividing by a negative
-8k<32
k>-4
f(-2) =-2x+11
Evaluate the function
Happy Holidays!
[tex]\large\boxed{f(-2) = 15}[/tex]
f(x) = -2x + 11
Find f(-2) by substituting in -2 for x:
f(-2) = -2(-2) + 11
Simplify:
f(-2) = 4 + 11
f(-2) = 15
after allowing 30% discount on the marked price of an article,there is a profit of 10% . if the cost price is 1500 find the marked price
Answer:
2357.14
Step-by-step explanation:
x - .30x = 1500(1.10)
.7x = 1650
x = 2357.14
The cost of renting a jet ski for a certain number of hours can be modeled by
y=40x+50.
How much does it cost per hour?
Find the value of r so the line that passes through the pair of points (-4, 8) and (r, 12) has the slope 4/3
.
Answer:
-1
Step-by-step explanation:
4 / (4/3) gives us three, which when added to -4 results in -1
parallel ,perpendicular, neither y=4x+5 and -4x +y=-13
Answer:
here,
slope of line y=4x+5(m1)=-a/b
=4
slope of line -4x+y=-13(m2)=-a/b
4
here m1=m2 so,these are parallel to each other.
A baby giraffe has a mass of 12 Kg. How many grams is the baby girafe?
Answer:
The answer is that the baby giraffe is 12,000 grams.
Please mark this as brainliest, thx. :)
Elizabeth uses 34.95 ounces of granola for 15 servings of trail mix. If each serving contains the same amount of granola, how much granola is in each serving?
Answer:
2.33 ounces
Step-by-step explanation:
Given that:
Ounces of granola used = 34.95 ounces
Number of servings of trail mix = 15 servings
Since each serving contains the same amount of granola :
Amount of granola in each serving :
Ounces of granola used / Number of servings
34.95 / 15
= 2.33 ounces of granola per serving
13 erasers in your backpack is considered
a what?
Coach Teague is making breakfast for his 6 family members. He is making bacon and omelets. Each omelet needs 3 eggs, how many eggs does he need?
Answer:
18 eggs
Step-by-step explanation:
6 family member has 1 omelet, each omelet needs 3 eggs, 6 x 3 = 18 eggs :D
Simplify Negative 3 over 2 ÷ 9 over 6 . (5 points) -4 -1 4 1
Answer:
Step-by-step explanation:
[tex]\frac{3}{2}[/tex] ÷ [tex]\frac{9}{6}[/tex] = [tex]\frac{3}{2}*\frac{6}{9}\\[/tex]
= [tex]\frac{18}{18}[/tex]
= 1
Use KCF method,
Keep the first number.
Change the division to multiplication
Flip the second number
Answer:
sorry dude i need thos points
Step-by-step explanation:
A rectangular pool is 30 1/3 feet long and 12 1/2 feet wide. what is the area of the pool?
Note the 30 and 12 is a whole number
Answer:
381.25 or 381 1/4 feet
Step-by-step explanation:
Area is a rectangle is length times width. so,
30.5*12.5 = 381.25
if x2=18x+y and y2=18y+x, then find the value of root
Answer:
[tex]\sqrt{x^2+y^2+1}=18[/tex]
Step-by-step explanation:
We are given:
[tex]x^2=18x+y\qquad\qquad[1][/tex]
[tex]y^2=18y+x\qquad\qquad[2][/tex]
Subtracting [1] and [2]:
[tex]x^2-y^2=18x+y-(18y+x)[/tex]
Operating:
[tex]x^2-y^2=18x+y-18y-x[/tex]
Recall:
[tex]x^2-y^2=(x-y)(x+y)[/tex]
Substituting:
[tex](x-y)(x+y)=18x+y-18y-x[/tex]
Rearranging:
[tex](x-y)(x+y)=18x-18y-(x-y)[/tex]
[tex](x-y)(x+y)=18(x-y)-(x-y)[/tex]
Dividing by x-y (recall x≠y):
[tex]x+y=18-1=17[/tex]
[tex]x+y=17\qquad[3][/tex]
Now we add [1] and [2]:
[tex]x^2+y^2=18x+y+18y+x[/tex]
Rearranging:
[tex]x^2+y^2=18x+18y+x+y[/tex]
[tex]x^2+y^2=18(x+y)+(x+y)[/tex]
[tex]x^2+y^2=19(x+y)[/tex]
Substituting from [3]
[tex]x^2+y^2=19*17=323[/tex]
Adding 1:
[tex]x^2+y^2+1=324[/tex]
Taking the square root:
[tex]\sqrt{x^2+y^2+1}=\sqrt{324}=18[/tex]
Thus:
[tex]\mathbf{\sqrt{x^2+y^2+1}=18}[/tex]
Hurry I need help help
Step-by-step explanation:
C. This system is consistent. It has one solution.
particularly in algebra, a linear or nonlinear system of equations is called consistent
What are the area and perimeter of square TUVW?
Area=
Perimeter=
Answer:
Area: 196
Perimeter: 56
Step-by-step explanation:
1. Pick a side for both length and height and count the distance between the two coordinates (for example VU and UT)
VU = 14
UT= 14
Also important to note here that you don't even need to count the distance for both because since it's a square, all the sides are the same. Only did this to make it easier to understand the next step.
2. Since it's a square, as I said before, all sides are the same. So, you can go ahead and mark WT and VW as 14 as well.
3. To get the area, use the formula base times height.
14 x 14 = 196
4. For perimeter, simply add up all the sides (or multiply 14 by 4 since all are the same)
14+14+14+14=56
can someone help me with this please
Answer:
x<-4
Step-by-step explanation:
First you have to add 4 by both sides, which will give you 8x<-32.
Then just divide both sides by 8 and you should get the same answer.
BRAINIST & 20 POINTS!!
Answer:
y=2/3x-5
Step-by-step explanation:
First, let's put this equation into slope-intercept form.
2x-3y=24
-3y=-2x+24
y=2/3x-8
For two lines to be parallel, they must have the same slope. Therefore our slope is 2/3.
Now, we must find b. To do that we can plug the y and the x in.
-7=2/3(-3)+b
-7=-2+b
-5=b
y=2/3x-5
Answer:
y = [tex]\frac{2}{3}[/tex]x - 5
Step-by-step explanation:
Points: (-3, -7)
Equation: 2x - 3y = 24
2x - 3y = 24
-3y = -2x + 24
y = [tex]\frac{2}{3}[/tex]x - 8
y = [tex]\frac{2}{3}[/tex]x + b
-7 = [tex]\frac{2}{3}[/tex] ( -3 ) + b
-7 = -2 + b
b = -5
y = [tex]\frac{2}{3}[/tex]x - 5
The parking lot charges 75 cents for each half hour or part of a half hour. If Edie parks her car in the lot from 10:45 am until 1:05 pm, how much money will she pay?
Answer:
she will pay $3.75
Step-by-step explanation:
Which graph shows only a reflection?
Answer:
D BOTTOM RIGHT
Step-by-step explanation:
Write an algebraic equation that relates the Profit to the Number of T-Shirts Sold. Use n to represent T-Shirts and p to represent the Profit.
Answer:
y= 3x -5
Step-by-step explanation:
since when x is 0, and y is -5, you know that the y intercept is -5.
look at the table
1x -5 = -2
x= 3
Boom.
LONG LIVE KOREA!