Answer:
.
Step-by-step explanation:
Gabe Amodeo, a nuclear physicist, needs 90 liters of a 50% acid solution. He currently has a 30% solution and a 60% solution. How many liters of each does he need to make the needed 90 liters of 50% acid solution?
Answer:
You need two equations: one for solution amounts and one for alcohol amounts.
Step-by-step explanation:
90 = X + Y
45 = (0.6)/X + (0.3)Y
Here X = amount of 60 % solution and Y = amount of 30 percent solution. Note that percentages have been converted to decimal amounts in the second equation.
From here you have to solve two equations with two unknowns. Easiest to solve first equation for X = 90 - Y, then substitute into second equation. this get you one equation in one unknown. Solving you you will get
X = 30 liters and Y = 60 liters.
can someone show me the problems to 4/3 x 2/5 and 2/5 divided by 4/3
Answer:
8/15 and 3/10
Determine which choice best shows the distributive property of multiplication.
Question 3 options:
1 × 4 = 4 × 1
1 × 1 = 1
1 × (4 × 6) = (1 × 4) × 6
1 × (4 + 6) = (1 × 4) + (1 × 6)
Help 30 point question!
You're given 3 points (x, y) on the circle with equation
x ² + y ² + Dx + Ey + F = 0
and you have to use these known points on set up 3 equations involving D, E, and F.
For the point (3, -1), this means when x = 3, y = -1, so
3² + (-1)² + 3D - E + F = 0
→ 3D + (-1)E + 1F = -10
The next point (-2, 4) gives
(-2)² + 4² - 2D + 4E + F = 0
→ (-2)D + 4E + 1F = -20
And from the last point (6, 8),
6² + 8² + 6D + 8E + F = 0
→ 6D + 8E + 1F = -100
Which expressions represent the same value?
Please helpp
Answer:
a and d
Step-by-step explanation:
..... trust me ..... .....
What is 2/5x6 equal to
(HELP)matt weighed 60 pounds when he was 8 he now weighs 80 pounds. Find the percent of increase in weight rounded to the nearest tenth
O 20.0%
O 25.0%
O 30.0%
O 33.3%
Answer:
Percent of increase in weight = 33.33% Approx.
Step-by-step explanation:
Given:
Old weight = 60 pound
New weight = 80 pound
Find:
Percent of increase in weight
Computation:
Percent of increase in weight = [(New weight - old weight)/Old weight]100
Percent of increase in weight = [(80 - 60)/60]100
Percent of increase in weight = [(20)/60]100
Percent of increase in weight = 33.33% Approx.
PLEASE HELP I WILL GIVE BRAINLIEST EXPLAIN!!!
Answer:
1) $68.40
2)456 tickets
Step-by-step explanation:
1)
They need to raise $8,250.
They have already raised $3,120.
The amount they have still to raise is $8,250-$3,120=$5,130.
There are 75 band members, so the amount yet to raise per member is $5,130/75=$68.40.
2)
The businesses give $0.50 for every $1 in ticket sales, ie. they pay an extra 50% of the total.
Let number of tickets sold=x
Let money made from ticket sales = 7.5x
The total amount of money made is therefore 1.5(7.5x)=11.25x
The minimum amount of tickets to hit $5,130:
$5,130=11.25x
x=456
plzz tell me answer of 8 (b) question I can't get the right answer!!!
done
plz mark me brainliest ok
plz follow me
Lisa has to cut her grandma's grass this weekend and wants to know exactly how much area she will be cutting. Calculate the area of the polygon. Be sure to show all your work and explain your answer. Six-sided polygon that includes two isosceles right triangles, one with height and base of 20 feet, the other height and base of 6 feet, and one rectangle measuring 30 feet by 6 feet.
Answer:
398 ft
Step-by-step explanation:
Mr. Lawrence baked 25 cookies. 3 fifths of the cookies were oatmeal. How many oatmeal cookies did Mr. Lawrence bake?
Answer: 15
Step-by-step explanation:
Answer:
Step-by-step explanation:
25÷5=5
5x3=15
15 oatmeal cookies
You count 4 trucks and 11 cars in a college parking lot. Determine the fraction of cars to total number of vehicles in the lot. Identify the numerator and denominator of your fraction.
Answer:
Fraction of cars 4/15
Total number of vehicles 15
4 is the numerator and 15 is the denominator
Step-by-step explanation:
PETS Each month Travis spends $20 for premium food$10 for treats $18 for grooming, and $3 for toys for his pet. Write an expression that could be used to determine the amount he spends on these items for his pet over a period of 12 months.
Answer:
$492 per year
Step-by-step explanation:
The first step we take towards solving this question is to add all the numbers we were given as money spent(excluding that of the month)
$20 + $10 + $18 + $3 = $41 per month
This means that a total of $41 was spent per month.
Going further, since we're told it's 12 months, we then multiply it by 12, and thus, we have
$41 * 12 = $492 per year
Therefore, the total money spent is $492 per 12 months, or per year
Please help this is the last question I need I don't get it
400 hope this helps!
May I have brainliest please? :D
_ % of 4 is 7 someone pls help me
Answer:
175% of 4 is 7
Step-by-step explanation:
i hope this helps
What is the equation of the line through the points (2,3) and (4, 5)?
What is f3 if f(x)=2x+1
Answer:
7
Step-by-step explanation:
F(x) =2x+1
f(x) =6+1
Armando has 3 blue shirts, 3 green shirts,
and 2 red shirts. He has 3 pairs of jeans
and 4 pairs of cargo pants. He is equally
likely to wear any of the shirts with any
pair of pants. What is the probability that
Armando will wear a green shirt with cargo pants?
Answer:
0.2143 = 21.43% probability that Armando will wear a green shirt with cargo pants.
Step-by-step explanation:
Probability:
A probability is the number of desired outcomes divided by the number of total outcomes.
Probability of independent events:
The probability of two independent events is the multiplication of their separate probabilities.
Green shirt:
3 green shirts, out of 3 + 3 + 2 = 8 shirts.
So 3/8 probability of green shirts.
Cargo pants:
4 cargo pants, our of 4 + 3 = 7.
So 4/7 probability of cargo shirts.
Green shirt and cargo pants:
[tex]p = \frac{3}{8} \times {4}{7} = \frac{12}{56} = \frac{3}{14} = 0.2143[/tex]
0.2143 = 21.43% probability that Armando will wear a green shirt with cargo pants.
HELLLP!!!!!
two major cities each have a population of 25,000 people. the population of city A increases by about 260 people per year. the population of city B increases by about 1% every year.
Answer:
City A
Year 0: 25,000
Year 1: 25,260
Year 2: 25,520
Year 3: 25,780
Year 4: 26,040
Year 5: 26,300
City B
Year 0: 25,000
Year 1: 25,250
Year 2: 25,502
Year 3: 25,757
Year 4: 26,014
Year 5: 26,274
In year 5 City B will have a larger population. City B has a more exponetial model while City A is more linear model.
Step-by-step explanation:
How do the values of the 5s in 73.591 and 8.075 compare?
A.10
B.100
C.1,000
PLEAS HELP!
Answer:
100
i hope it helps
Answer:
100
Step-by-step explanation:
pls help, my teacher told me to translate this as an assignment so pls help.
th3f1r5t345y4551gnm3ntf0r411th35t9d3nt5.
and also this to. th3l45td4y0f5ch00l15601n6t0b31n4wh1l3.
answer key. y=7 e=3 s=5 a=4 9=u i=1 o=0 z=2 g=6 8=b.
Answer:
the first easy assignment for aii the students
the first day of school is go in to be in a while
Step-by-step explanation:
A polling organization contacts 1657 undergraduates who attend a university and live in the United States and asks whether or not they had spent more than $200 on food in the last month.
Step-by-step explanation:
gyJfdgruhj jdjgldnldnpf m xlhsubdkvakvisbd bsojdk slvdm fmbisgdo jSvks
Find the value of x.
65°
(x + 12)
X-53
X = 65
x-77
x = 103
Answer:
The answer is -77
Step-by-step explanation:
Hope this helped! Have a great day!
А 1 cm
B. 5 cm
C. 11 cm
D. 25 cm
5 is the answer
here we have hypoteaus and base
so by using pythagoreaus theorem
p^2 = h^2 - b^2
p^2 = 13^2 - 12^2
p^2 = 169 - 144
p^2 = 25
p = root under 25
p = 5
Answer:
5 cm
Step-by-step explanation:
A^2+B^2=C^2
12^2+B^2=13^2
144+B^2=169 (You have to subtract 144 from both sides to get B^2 by its self)
-144 = -144
B^2= 25 (To get rid of the square you have to find the square root)
Square root of 25 = 5cm
Martha went to a restaurant with some friends. The three of them split a large pizza. Martha then ordered a large soda for $5. Martha spent a total of $11. How much was the large pizza? (pls!!!!)
Answer:
$6
Step-by-step explanation:
there was 11 total and 5 went into the soda and 6 went into the pizza so it's 6.
Find the value of the power.
8^3 =
Answer
Answer:512
Step-by-step explanation:
Answer:
512
Step-by-step explanation:
8*8*8=512
The box-and-whisker plot shows the shoe sizes of the soccer players at Wendell Middle School.
Box-and-Whisker Plot
Soccer Players' Shoe Sizes
A
B
CD
E
4
+++++
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Which letter on the box-and-whisker plot corresponds to the maximum shoe size?
Α. Α.
ODD
OB. B
O E E
Answer:
B.
Step-by-step explanation:
AJUDIATION.Mr. Smith has a maximum of $50 to spend at a museum. A ticket to the museum costs $7. He
can spend p dollars to buy other things at the museum. Which inequality can be used to find
the possible values for p?
Answer:
Step-by-step explanation:
After buying the ticket, the amount with him = 50 - 7 = 43
p ≤ 50 - 7
p ≤ 43
Answer:
p≤ 43
Step-by-step explanation:
50-7=43
so now Mr.smith will have $43 to spend
p is less than or equal to 43
How much more than 1/4 cup is 3/4 cup?
Answer:
half a cup
Step-by-step explanation:
75% minus 25% is 50% aka 1 half
An automobile manufacturer sold 30,000 new cars, one to each of 30,000 customers, in a certain year. The manufacturer was interested in investigating the proportion of the new cars that experienced a mechanical problem within the first 5,000 miles driven. a) A list of the names and addresses of all customers who bought the new cars is available. Each customer from a simple random sample of 1,000 customers who bought one of the new cars was asked whether they experienced any mechanical problems within the first 5,000 miles driven. 400 customers from the sample reported a problem. Of the 400 customers who reported a problem, 140 customers, or 32.5%, reported a problem specifically with the power door locks. Explain why 0.35 should not be used to estimate the population proportion of the 30,000 new cars sold that experienced a problem with the power door locks within the first 5,000 miles driven.
Answer:
The reason that 0.35 should not be used to estimate the population proportion of the 30,000 new cars sold that experienced a problem with the power door locks within the first 5,000 miles driven is that 0.35 does not represent the sample proportion.
The correct sample proportion is 0.14 (140/1,000) and not 0.35 (140/400). It is this that can be used to estimate the population proportion and not 0.35.
Step-by-step explanation:
a) Data and Calculations:
New cars sold by the automobile manufacturer = 30,000
Number of customers that the 30,000 new cars were sold to = 30,000
Simple random sample = 1,000 customers
Number of customers from the SRS that reported a problem = 400
This is equal to 40% of the sample (400/1,000 * 100)
Proportion of customers who reported a problem (specifically) with the power door locks = 140/400 = 0.35
Proportion of customers out of the sample that reported specifically a problem with the power door locks = 140/1000 = 0.14.