Step-by-step explanation:
Let +a+ = liters of 40% solution needed
Let +b+ = liters of 25% solution needed
+.4a+ = liters of HN03 in 40% solution
+.25b+ = liters of HN03 in 25% solution
------------------------------------
(1) +%28+.4a+%2B+.25b+%29+%2F+57+=+.26+
(2) +a+%2B+b+=+57+
-----------------
(1) +.4a+%2B+.25b+=+.26%2A57+
(1) +.4a+%2B+.25b+=+14.82+
(1) +40a+%2B+25b+=+1482+
Multiply both sides of (2) by +25+
and subtract (2) from (1)
(1) +40a+%2B+25b+=+1482+
(2) +-25a+-+25b+=+-1425+
+15a+=+57+
+a+=+3.8+
and, since
(2) +a+%2B+b+=+57+
(2) +3.8+%2B+b+=+57+
(2) +b+=+53.2+
3.8 liters of 40% solution are needed
53.2 liters of 25% solution are needed
check:
(1) +%28+.4a+%2B+.25b+%29+%2F+57+=+.26+
(1) +%28+.4%2A3.8+%2B+.25%2A53.2+%29+%2F+57+=+.26+
(1) +%28+1.52+%2B+13.3+%29+%2F+57+=+.26+
(1) +14.82+=+.26%2A57+
(1) +14.82+=+14.82+
think you should got the answer
which one is right and which one is wrong? what are the errors made?
Find the time based on the information given.
The time is ___ hours.
Time = Rate ÷ Distance
= 140.9649 mph ÷ 500 miles
= 0.28 hours
89.2x5.3
show steps ppls
Answer:
472.76
Step-by-step explanation:
6:29
Multiplying decimals: place value (video)
Khan Academy · Khan Academy
Mar 23, 2021
I need help on this math it’s 7th grade
Answer:
4 times as long
Step-by-step explanation:
If im wrong, delete this.
Answer:
The wavelength of red light is 2 times longer than the wavelength of violet light.
Step-by-step explanation:
8 times 10^-7 written in standard form is 0.0000008
4 times 10^-7 written in standard form is 0.0000004
divide both of them:
=2
х
f(x)
o
Complete the table using the
function f (x) = 2(x + 2) + 4x.
16
10
94
TYPE ONLY NUMBERS
The number that goes with O is
The number that goes with 16 is
The number that goes with 10 is
The number that goes with 94 is
x= 0
f(0)= 2(0+2)+ 4(0)= 4
f(16)= 2(16+2)+ 4(16) = 100
f( 10) = 2(10+2) + 4(10)= 64
f(94)= 2( 94+ 2) + 4(94) = 568
Please help me solve this ASAP
Answer:
6. [tex]\pi = \frac{C}{2r}[/tex]
7. Translation
Step-by-step explanation:
6: To solve for π means to isolate it on one side.
Step 1: Divide both sides by 2r.
[tex]\frac{C}{2r} = \frac{2\pi r}{2r}[/tex] [tex]\pi = \frac{C}{2r}[/tex]Therefore, π = circumference over twice the radius, or circumference over diameter.
7: #7 is a translation because each point is moving vertically 3 units and horizontally 1 unit (3 units up and 1 unit to the right). If it were a reflection, we'd be able to spot a line of reflection, but there isn't any here. Also, if it were a rotation, the triangle would change the way its angled, and it'd be in a different quadrant
Therefore, this is a translation.
What is the value of the digit 6 in
59,732.106?
6 hundredths
B
6 ten-thousandths
6 tentos
6 thousandths
Answer:
6 thousandths.
Step-by-step explanation:
The 1 in the number 59,732.106 would the tenth value.
The 0 in the number 59,732.106 would be the hundreth value since its past the decimal point,
The pattern goes by the tenth, hundredth, thousandth, and then ten-thousandth.
-kiniwih426
25
25 raise to power 5 x equals to 625
[tex]25 ^{ 5x = 625 }[/tex]
Answer:
If you want what x equals it should equal 5^-6
Step-by-step explanation:
PLZZ HELLPP! WILL MARK BRAINLIEST!! if 12 cats can catch 6 rats in 2 hours, how many hours would it take 50 cats to catch 75 rats?
Solve for x. Show each step of the solution.
2.5(4-x)+12=21-4(2.5x+7)
Answer:
x=-58/15
Step-by-step explanation:
distribute first 10-2.5x+12=21-10x-28
Simplify(add the numbers) 22-2.5x=-7-10x
move the variable to the left side 22-2.5x+10x=-7
move the constant to the right side -2.5x+10x=-7-22
simplify like terms 7.5x=-29
divide by 7.5 x=-58/15
alternate forms are x=-3 13/15 or x=-3.86
Is line p || to line q? Why?
Step-by-step explanation:
yes, because the angles match. per rule of intersecting lines the angles in one side of an intersected line are the same but mirrored on the other side of the line.
since q behave exactly as p would regarding the intersecting angles, they are parallel.
32 450 to nearest hundred
Answer:
32,500
Step-by-step explanation:
let h(x) be the inverse of f(x).If h(x)=-4+1 find f(x)
Assuming you meant to type h(x)=-4x+1
Answer:
[tex]f(x)=-\frac{1}{4}x+\frac{1}{4}[/tex]
Step-by-step explanation:
We know that, because [tex]h(x)[/tex] is the inverse of [tex]f(x)[/tex], that [tex]h(f(x))=x[/tex], so [tex]-4f(x)+1=x[/tex].
Aha! We can solve for [tex]f(x)[/tex]!
We subtract [tex]1[/tex] from both sides to get [tex]-4f(x)=x-1[/tex].
Finally, we divide both sides by [tex]-4[/tex] to get [tex]\boxed{f(x)=-\frac{1}{4}x+\frac{1}{4}}[/tex].
Store A sells four bags of chips for $5.00. Store B sells eight bags for $7.00. Which has the lower unit price? Show your work using mathematics.
Answer:
none because the price is just one dollar up for each store and the bags of chips are 1 less than how much you have to pay.
Step-by-step explanation:
Solve for x using the figure to the right. x=
Answer:
Step-by-step explanation the answer is 3
Write the equation of the line in fully simplified slope/intercept form
Answer:
y = m x + b standard form for straight line
m = (y2 - y1) / (x2 - x1)
When y2 = 12, x = -6
when y = 0, x = -2
m = (12 - 0) / (-6 - (-2)) = -3
so y = -3 x + b
Also, when x = 0, y = -6
Our equation is
y = -3 x - 6
As a check try x = -2
y = (-3 * -2) + (-6) = 0 as the graph shows
1. Find three consecutive interferes whose sum is -30. (Answer choices) A.)-8, -10, -12 B). -11, -12, -13 C.) 11, -10, -9 D.) -8, -9, -10
Find three consecutive even internet’s whose sum is 120
A.) 38, 39, 40
B.) 39, 40, 41
C.) 36, 38, 40
D.) 38, 40 , 42
HELP ASAP
Answer:
] The three consecutive even numbers are 38, 40 and 42. The smallest of the three is clearly 38. Step-by-step explanation:Even numbers are of the form [math]2k[/math], [math] k \in \mathbb{Z}[/math]. Three consecutive even numbers are of the form [math]2k[/math], [math]2(k+1)[/math], [math]2(k+2)[/math]. We have that their sum is 120 therefore [math]\\2k + 2(k+1) + 2(k+2) = 120 \Leftrightarrow k+(k+1)+(k+2) = 60 \Leftrightarrow 3(k+1) = 60 \\ \Leftrightarrow k+1=20 \Leftrightarrow \boxed{k=19}.[/math
Use the table from Callie's Candies to answer the question.
Lily is buying candy for party favors. She needs 1.5 pounds of chocolates, 0.75 pounds of mints, and 15 lollipops. What is the total cost for the candy?
A.
$5.84
B.
$8.82
C.
$15.30
D.
$18.27
just show the letter
There are 109 nanoseconds in 1 second.
Find the number of nanoseconds in 5 minutes, giving your answer in standard form.
The table shows the times of the top six swimmers in the women's 100 meter butterfly at the 2021 Olympic Games.
Answer:
with 6 rows. Column 1 is labeled Place with entries 1, 2, 3, 4, 5, 6. Column 2 is labeled Time (seconds) with entries 55.98, 56.87, 56.94, 57.17, 57.27, 57.35. Between which two places is the difference in finishing times the shortest? What is the difference in those times?
Step-by-step explanation:
What expression would give a sum of 16
What expression would give you a product of 16
Answer:
12+4 is the expression that will give you a sum of 16
4•4 is an expression that will give you a product of 16
remember an expression does not have an equal sign if it had an equal sign then it would be an equation and expression has no equal sign
AHH HELPPPP !!!!
-In the following diagram, two parallel lines are cut by a transversal. The measure of which angle is equal to the measure of angle 1 ?
a - angle 2
b - angle 3
c - angle 4
d - angle 6
Answer:
angle 4
Step-by-step explanation:
1 and 4 are vertical angles
∠1 = ∠4
This according to the vertical angle theorem
Hope this helps!!
Help, somebodyyyyyy aaaaa I need an explanation :<
Answer:
Step-by-step explanation:
wht grade is this?
HELPPP
Find the domain of the function represented by the graph. Determine whether the domain is discrete or continuous.
Which situation can be represented by the equation 4d + 5 = 29?
Answer:
d=6
Step-by-step explanation:
subtract 5 from both sides
then simplify what you get
then divide both sides by 4
then simplify to get answer
16. Make Sense and Persevere
Meghan's vegetable garden is pictured
below. What is its area?
21 ft
18 A
12 ft
38 ft
if it takes 40 gallons of gas to drive 750 miles, then how many gallons are needed to drive 300 miles?
through: (2,5), parallel to x=0
Answer: y = 0x + 5
Step-by-step explanation: Parallel means same slope and then substitute the numbers for b.
Alexandra had a 15% coupn for movie tickets. The total cost of the movie tickets was $66. How much did she pay after the discount?
Answer:
$56.10
Step-by-step explanation:
Alexandra has a $66 ticket with a 15% discount. 15% of 66 is 9.9
Subtract the discount (9.9) from the cost $66
$66-$9.9= $56.10
Answer:
i think its 9.9
Step-by-step explanation:
just use a calculator
what rational function is this?
vertical asymptote: x=6
horizontal asymptote: y=0
x intercepts: none
y intercepts: (0,2/3)
no removable discontinuities
end behavior: as x approaches -infinity, y approaches 0. as x approaches infinity, y approaches infinity. as x approaches 0, y approaches infinity. as x approaches -infinity, y approaches infinity
Answer:
even degree with positive leading coefficient for end behavior x ----> infinity, y ---> infinity
Step-by-step explanation:
I have a chart you can use