Answer:
Step-by-step explanation:
Negative
A scientist has two solutions, which she has labeled Solution A and Solution B. Each contains salt. She knows that Solution A is 55% salt and Solution B is 80%
salt. She wants to obtain 30 ounces of a mixture that is 65% salt. How many ounces of each solution should she use?
Nana bought 12 books for $28.50. What was the unit price?
Answer: 2.375 per book
Step-by-step explanation:
Answer:
2.375 per book
Step-by-step explanation:
divide 28.50 by 12 to get the unit rate which is 2.375 per book
Will give Brainlies!!!
What is the y=mx+b of the equation 3x−2y=12
Answer:
y=3/2x-6
Step-by-step explanation:
To find the y=mx+b you need to move the y on one side while moving the others on the other side
First, move the 3x to the other side by subtracting by 3x on both sides:
-2y=-3x+12
Divide by -2 on both sides:
y=3/2x-6
Answer:
y=3/2x-6
Step-by-step explanation:
3x-2y=12
isolate the y:
-2y=-3x+12
get rid of the coefficient in front of y by dividing by -2
y=-3/-2x+12/-2
y=3/2x-6
WILL MARK YOU BRAINLIEST
Answer:
the second : the angles are congruent and the side lengths are proportional
In the right triangle ABC, CD is an altitude, and c=e+f,by combining three equations it can be shown that a^2+b^2=c^2.One of the equations is c=e+f.which of the following could be the other two equations
Answer:
Please provide a diagram as the question is confusing.
For the 1,000-meter running event, Abby's mean time is 4.5 minutes with a standard deviation of 0.75 minutes. For the 800-meter event, Abby's mean time is 3.2 minutes with a standard deviation of 0.4 minutes. In the last track meet, Abby ran the 1,000-meter race in 4.1 minutes and the 800-meter race in 3 minutes. In which event did Abby have a better performance?
Answer:
He performed better in the 800 m race
Step-by-step explanation:
Obtain the standardized score for each event :
Zscore = (score - mean) / standard deviation
1000 meter :
Mean = 4.5 ; Standard deviation = 0.75 ; x = 4.1
Zscore = (4.1 - 4.5) / 0.75
Zscore = - 0.4 / 0.75 = - 0.5333
800 meter :
Mean = 3.2 ; Standard deviation = 0.4 ; x = 3
Zscore = (3 - 3.2) / 0.4
Zscore = - 0.2 / 0.4 = - 0.5
-0.5 > - 0.533
Hence, he performed better in the 800 m race
Answer:
Abby had a better performance in the 800-meter because this z-score was closer to the mean than the z-score for the 1,000-meter.
Step-by-step explanation:
did it on egde
What has to happen for scales to be balanced?
Answer:
When the pans contain exactly the same mass the beam is in balance. ... You can place an object in one pan and standard weights in the other to find what the object weighs. Here balance scales are used to show that the box "x" has a mass of 4
Answer:
a balances measure mass, while scales measure weight. So if you bring a balance and a scale to the moon, the balance will accurately give you the mass of, say, a moon rock, whereas the scale will be affected by the gravity. A balance determines mass by balancing an unknown mass against a known mass.
Step-by-step explanation:
its right believe me and mark brainliest plz
The poster that lists the classroom rules in Mrs. Akin’s classroom has a length of 2/3 yard and a width of 3/4 yard.
It is C
3/4* 2/3= 6/12=1/2
I know it was kindda tricky but its a simpile question
rotation reflection or translation which one is it
Help? 11 3/4 is the quotient of a number y and 6 1/4
Answer:
y divided by 6 1/4 = 11 3/4
Step-by-step explanation:
First, change the mixed numbers into improper fractions:
y divided by 25/4 = 47/4
Next, multiply both sides by 25/4:
y divided by 25/4 x 25/4 = 47/4 x 25/4
The 25/4's on the left side of the equation cancel each other out, leaving you with:
y = 47/4 x 25/4
Multiply 47 x 25 and keep the same denominator:
y = 1,175/4
Divide and:
y = 293 3/4
Philip needs a board 28 inches long to complete a scout project how long is this in feet and inches
Answer:
2 ft 4 inches
Step-by-step explanation:
12 inches = 1 ft
28/12=2.4
Find the equation of the line use exact numbers
Y= ?x + ?
Fill in the ? Please I need help ASAP
Answer:
y=-2x+5
Step-by-step explanation:
10-x=-2x what is it ???
Answer:
x = - 10
Step-by-step explanation:
Given
10 - x = - 2x ( add 2x to both sides )
10 + x = 0 ( subtract 10 from both sides )
x = - 10
The population of a town in Devon was 2000.
A few years later, the population went down to 1800.
Find the percentage decrease.
Answer:
10%
Step-by-step explanation:
i need help i'm really stuck
Answer:
8
Step-by-step explanation:
If the area is 32 and the formula for area of a triangle is base * height / 2, and you have base = 8 and height = x and area = 32, this would be:
8 * x / 2 = 32
Now, solve:
[tex]8x/2=32\\4x=32\\x=8[/tex]
Answer:
x=8
Step-by-step explanation:
Area is equal to half of the base times the height. We are told that the area is 32and the base is 8, so we can write this equation:
32=1/2(8)h
Multiply 1/2 by 8:
32=4h
Divide both sides by 4:
h=8
So now we know that x (the height) equals 8.
HTH :)
Which is a better deal: 4 pounds of apples for $1 or 9.534
kilograms per dollar?
Answer:
9.534 kg per dollar is the better deal
Step-by-step explanation:
when you covert 9.534 kg to lb you'll get 21.019 pounds which is a much better deal than 4, and because 21>4
One hundred forty-four of the 180 seventh-grade students attended the school dance last Saturday night. What percentage of seventh-grade students did NOT attend the dance?
Answer:
20%
Step-by-step explanation:
Because 144 OUT OF the 180 seventh grade students attended, this would represent 144/180.
But since we are trying to solve how many did NOT attend the dance, you must subtract 144 from 180 which equals 36. So 36/180 did not attend the dance.
But to make it a percentage, you divide 36/180. Fraction and percentage are like buddies! That's why it is very simple to make a fraction into a percentage.
36/180 can be simplified to 1/5, which as a decimal, is 0.20.
0.20 is same as 20%, so this should be the students that did not attend the dance.
I hope this helps. If this is wrong, I truly apologize...
Answer:20
Step-by-step explanation:
20
Beth has $105 in her bank account. She buys x shirts for $5.75 each. Write and solve an equation Beth can use to find how many shirts she can buy with the money in her account.
Answer:
The equation for that would be 5.75x=105 and if you wanted the value for x it is 18.26(18 shirts)
Step-by-step explanation:
SInce she can't buy any decimal or fraction of a shirt then it would be 18 shirts.
6TH GRADE MATH!!
A store makes 20% profit on the total price of all the items they sell.
let t represent the total price of all items sold in dollars, and let p represent the profit in dollars.
1) WRITE AN EQUATION TO REPRESENT THE RELATIONSHIP BETWEEN THESE VARIABLES:
Pls help! I don’t understand!! :/
Answer:
p=1/5t
Step-by-step explanation:
Since t is 100% of the items sold and p is 20% of that, the profit, p is 20% of t, or 1/5t.
Answer:
p = t(0.2)
Step-by-step explanation:
The profit is 20% of the total price. So if you multiply the total price by 0.2, you will get 20% of the total price which is the profit.
(2x + 3) + (x + 1)
help
Hi! Can someone help me?
3-x divide by 3/5; x=1/4
(7,−8) and (x,-5) with a slope of -3/4
I have to find the value of X
Answer:
we have
slope=(-5--8)/(x-7)
-3/4=3/(x-7)
-3(x-7)=3×4
-3x+21=12
21-12=3x
3x=9
x=9/3=3
Answer:
x = 3
Step-by-step explanation:
slope = [tex]\frac{y_{2} - y_{1} }{x_{2} -x_{1} }[/tex]
Using the your two points the slope = m = [tex]\frac{-8 + 5}{7-x} = \frac{-3}{4}[/tex]
[tex]\frac{-3}{7-x} =\frac{-3}{4}[/tex]
Since the numerators are equal, then the denominators must be equal.
So, 7 - x = 4
-x = -3
x = 3
Find the slope and y-intercept of the line.
4)
m=
b=
Answer:
m=y = 2x + 4.
y intercept is 4
Step-by-step explanation:
55 videos to 77 videos
Answer:
The ratio is 55:77
Step-by-step explanation:
what is the result of adding these two equations 8x-4y=-4 -3x+4y=5
Answer:
8x-4y=-4
-3x+4y=5
+
-----------------(adding equation)
5x=9
is a required answer
PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ HELP NEED ANSWER NOW!!!!!!!!!!!!!!!!!
solve each linear system by GRAPHING. CHECK YOUR ANSWER
2.) x - y = 6
2x = 12 + 2y
3.)1/2 x - y = 4
2y = x + 6
Answer:
2.) Infinitely many solutions
3.) No solutions
Step-by-step explanation:
To solve systems of equations graphically, you need to find where they intersect
2.) First put each equation in the form y=mx+b
x-y=6 -> y= x-6
2x=12+2y -> y= x-6
Then, graph each line
Since we have the same equation, the lines are on top of each other so there are infinitely many solutions as they intersect everywhere.
To check, plug a point in from the graph into both equations and you should get 0=0
3.) First put each equation in the form y=mx+b
1/2x-y=4 -> y=1/2x-4
2y=x+6 -> y=1/2x+3
Then, graph each line
Since the lines have the same slope but a different y intercept, the lines are parallel. Therefore, there are no solutions as they do not intersect.
To check your answer, you would one equation as the y in the other equation.
2(1/2x-4)=x+6, then solve for x
Then plug that x into the original equations, and you'll see they are not equal. Hope that helps!
Use the diagram to the right to solve for y.
A y = 13
B
y = 15
C. y = 7.5
D
y = 20
Answer: D y=20
Step-by-step explanation: I minus 115 and 120 and and multiplied 4x and i got y=20. I hope this helps
what is the graph of y = x2 + 8x + 4?
find the slope of the line that goes through the given points
1. (0,7) (0,-8)
2. (-7,9) (-18,9)
3. (-5,9)(7,3)
4. (-7,8)(8,-3)
find the slope of the line from the given equation
1. y=-3x-4
2. y=2x+1
3. y= 3/2x
4. y= 5/9x+10
PLEASEEE HELP ILL MARK BRAINLIST
Answer:
1st=2. (-7,9) (-18,9)
2nd=4. y= 5/9x+10
The answers..............................plz and thx
Answer:x=6
Step-by-step explanation:
