Answer:
creo que es e numero 2
Step-by-step explanation:
el numero 2 al cuadrado es 4 si le restas su mitad(2) te da como resultado 2.
Kate ran 4 miles. How far did she run in kilometers?
Answer:
About 6.44 kilometers
Step-by-step explanation:
I mile is approximately 1.61 kilometers, so 4 miles would be 1.61 · 4 = 6.44 kilometers.
Hope this helps!
Twice a number n decreased by seven (ez points for ez question so answer )
Karen buys apples and bananas for the daycare center she runs. The apples cost $1.50 per pound, and the bananas are $0.50 per pound. The table shows the amounts of apples and bananas she has purchased the previous six weeks. Apples, x (pounds) 5 10 7 3 9 12 Bananas, y (pounds) 5 5 12 14 9 2 This week, Karen will spend $20.50 on apples and bananas. Write an inequality that describes both the amounts of apples and bananas she has purchased in the past six weeks and the amounts she may buy this week. Enter the correct answer in the box. Write your answer in the form ax + by = c, using the appropriate inequality symbol in place of the equal sign.
Answer:
Step-by-step explanation:
A scientist has two acid solutions: Artesia, which is a $70\%$ acid solution, and Borromeo, which is a $20\%$ acid solution. (a) Find the amount of Artesia (in mL) that must be added to $500$ mL of Borromeo in order to produce a $60\%$ acid solution. (b) Find the amount of Artesia and Borromeo (in mL) that can be combined in order to form a $100$ mL solution that is $55\%$ acid. (c) Does there exist a combination of Artesia and Borromeo that is $80\%$ acid?
Answer:
(a) 2000 mL
(b) 70 mL, 30 mL
(c) No
Step-by-step explanation:
Given that Artesia is a 70% acid solution, and Borromeo is a 20% acid solution.
(a) Let x mL of Artesia is added to 500 mL of Borromeo to produce a 60% acid solution.
So, 70% of x + 20% of 500 = 60% of (x+500)
[tex]\Rightarrow 0.7 \times x + 0.2 \times 500 = 0.6 \times (x+500) \\\\\ \Rightarrow 0.7 \times x + 0.2 \times 500 = 0.6 \times x+0.6 \times500\\\\ \Rightarrow 0.7 \times x -0.6 \times x= 0.6 \times500- 0.2 \times 500 \\\\ \Rightarrow (0.7-0.6) \times x = (0.6-0.2) \times500\\\\\Rightarrow 0.1 \times x = 0.4 \times500\\\\[/tex]
[tex]\Rightarrow x = (0.4 \times500)/0.1=2000[/tex] mL.
(b) Let x mL of Artesia and y mL be combined in order to form a 100 mL solution having 55% acid solution.
So, x+y=100\Rightarrow y= 100-x
And, 70% of x + 20% of y = 55% of (100)\\\\
[tex]\Rightarrow 0.7 \times x + 0.2 \times (100-x) = 0.55 \times 100\\\\\Rightarrow 0.7 \times x + 0.2 \times 100- 0.2 \times x = 0.55 \times 100\\\\\Rightarrow 0.7 \times x -0.2 \times x= 0.55 \times100- 0.2 \times 100 \\\\\Rightarrow (0.7-0.2) \times x = (0.55-0.2) \times100\\\\\Rightarrow 0.5 \times x = 0.35 \times100\\\\[/tex]
[tex]\Rightarrow x = (0.35 \times100)/0.5=70[/tex] mL.
and y= 100-x= 100-70=30 mL.
(c) Let x mL of Artesia and y mL of Borromeo be combined in order to make 80% acid solution.
And, 70% of x + 20% of y = 80% of (x+y)
[tex]\Rightarrow 0.7 \times x + 0.2 \times y= 0.8 \times (x+y)\\\\\Rightarrow 0.7 \times x + 0.2 \times y = 0.8 \times x +0.8 \times y\\\\\Rightarrow (0.7-0.8) \times x = (0.8-0.2) \times y\\\\\Rightarrow -0.1 \times x = 0.6 \times y \\\\\Rightarrow \frac {x}{y} = -6 \\\\[/tex]
As x and y are amount of Artesia and Borromeo, so x>0 and y>0
[tex]\Rightarrow x/y >0[/tex], so the negative value of x/y is not possible.
Ad the negative value of x/y is not so x/y=-6 is not possible, hence, any combination of Artesia and Borromeo that is 80% acid solution is not possible.
What is the difference between the SSS/SAS congruency postulate and the SSS/SAS similarity postulate?
Help Please!!!!
Answer:
This states that if two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the triangles are congruent. And third, there's the ASA postulate.
Step-by-step explanation:
Googled it. Hope this helps
what is 4.89 times 6.3 in dollars and cents plz i really need help!:(
Answer:
$30.81
Step-by-step explanation:
4.89 x 6.3 = 30.807 = 30.81 (rounded)
30 dollars
81 cents
Answer:
36.18
Step-by-step explanation:
3. PLEASE HELP! Jenna just opened a checking account at the bank. Within the first month, she deposited three checks for $34.98, $51.02, and $51.22. She withdrew $5.23 for new pencils, $5.22 for cards, and $7.89 for movies from her account in the same month.
(a) Write Jenna's withdrawals as negative rational numbers and her deposits as positive rational numbers.
(b) Order the rational numbers from least to greatest and explain your reasoning.
(c) What is the greatest deposit within Jenna's account so far?
Answer:C) She would have $216.88.
Step-by-step explanation:
A) Deposits: +34.98; +51.02; +51.22
Withdrawals: -5.23; -5.22; -7.89
B) -7.89, -5.23, -5.22, +34.98, +51.02, +51.22
The smallest amount will be the largest withdrawal, as it takes away from the account; the largest amount will be the largest deposit, as it adds to the account.
98 + 34.98 = 132.98 + 51.02 = 184.00 + 51.22 = 235.22 - 7.89 = 227.33 - 5.23 = 222.10 - 5.22 = 216.88
5x+9−2x+13=67 solve the equation
Answer:
5x+9−2x+13=67
3x+9+13=67
3x+22=67
3x=45
x=15
Mark brainliest!!
Step-by-step explanation:
3x + 22 = 67
3x = 67 - 22
3x = 45
x = 45/3
put the this is ur calculator and u will get the answer
HELP ANSWER THIS QUESTION
Answer:
f^-1(x) = (x+2)/3
Step-by-step explanation:
F(x) = 3x-2
substitute x for y, and f(x) for x: x = 3y - 2
Solve for y: x + 2 = 3y
y = f^-1(x) = (x+2)/3
I need help with this 9/2 divided by 2/9
Answer:
20.25
Step-by-step explanation:
decimal form- 20.25
fraction form- 81/4 simplified-20 1/4
What is the argument of -5\sqrt{3}+ 5i?
Answer:
150 degrees
Step-by-step explanation:
Graphing the complex number we see the angle terminates in the second quadrant. This means the argument, the angle, will be between 90 degrees and 180 degrees.
So if we create a right triangle with that point after graphing it. We see the height of that triangle is 5 because that is the imaginary part. The base of that triangle has length [tex]5\sqrt{3}[/tex]. The problem is this doesn't give us any part of the angle we want, but it does give us the complementary of the part of the angle that is in second quadrant.
Let's find the complementary angle.
So the opposite side of the complementary angle is 5.
The adjacent side of the complementary angle is [tex]5\sqrt{3}[/tex].
[tex]\tan(\theta)=\frac{5}{5\sqrt{3}}[/tex]
[tex]\tan(\theta)=\frac{1}{\sqrt{3}}[/tex]
[tex]\theta=\tan^{-1}(\frac{1}{\sqrt{3}})[/tex]
[tex]\theta=30[/tex]
So 90-30=60.
The answer therefore 60+90=150.
Answer:
D 150 degrees
Step-by-step explanation:
got it right on edge
Simplify: (just give the answer)
6²+4²
Answer:
10 squared
Step-by-step explanation:
Answer: 52
Step-by-step explanation:
6*6 = 36 4*4 = 16
36+16=52
(y - 2)2 = y2 – 6y + 4
Is this statement true or false?
==============================================
Explanation:
I'm assuming you meant to type out
(y-2)^2 = y^2-6y+4
This equation is not true for all real numbers because the left hand side expands out like so
(y-2)^2
(y-2)(y-2)
x(y-2) .... let x = y-2
xy-2x
y(x)-2(x)
y(y-2)-2(y-2) ... replace x with y-2
y^2-2y-2y+4
y^2-4y+4
So if the claim was (y-2)^2 = y^2-4y+4, then the claim would be true. However, the right hand side we're given doesn't match up with y^2-4y+4
--------------------------
Another approach is to pick some y value such as y = 2 to find that
(y-2)^2 = y^2-6y+4
(2-2)^2 = 2^2 - 6(2) + 4 .... plug in y = 2
0^2 = 2^2 - 6(2) + 4
0 = 4 - 6(2) + 4
0 = 4 - 12 + 4
0 = -4
We get a false statement. This is one counterexample showing the given equation is not true for all values of y.
What are three different ratios that are equivalent to the ratio 3:11.?
Explain your answer
Answer:
6:2212:4430:110Step-by-step explanation:
3 × 2 = 6, 11 × 2 = 22; put them together: 6:223 × 4 = 12, 11 × 4 = 44; put them together: 12:443 × 10 = 30, 11 × 10 = 110; put them together: 30:110I hope this helps!
A man can run 1 mile in 6 minutes. How fast is this measured in feet per second?
How fast is this measured in miles per hour? Hint: 5280 feet=1 mile
316800
Step-by-step explanation:
A cab company chargers a $3.50 boarding fee and $0.50 per mile. Write an equation to describe the relationship between the cost of the cab ride and the number of miles traveled.
Answer:
T = 0.50m + 3.5p
Step-by-step explanation:
if T is the total cost and m is the miles driven and you have a fee of $3.50, the equation would be 3.50 + 0.50m = T which can be written like that or re written as T = 0.50m + 3.5p.
hope this helps :)
Determine the area of squre ABCD with AB=3cm
Answer:
Area: [tex]9 cm^{2}[/tex]
Step-by-step explanation:
Since all sides of a square have equal lengths, the area of the square is [tex]a^{2}[/tex] (a = length of a side).
Since the length of the side of the square is given (is 3cm), the area of the square is [tex](3cm)^{2}[/tex] = [tex]9cm^{2}[/tex]
Answer:
9
Step-by-step explanation:
3 by 3 is 9
At the same time a 15-foot pole casts a 7.5-foot shadow; a nearby tree casts a 24-foot
shadow. How tall is the tree?
Answer:
12-foot shadow
Step-by-step explanation:
hope this helps :3
if it did pls mark brainliest
sorry if im wrong
BRAINLIEST
If point B has coordinates (-8,1), what are the coordinates of the point when it is
reflected across the y axis?
Answer:
it is (8;1)
Step-by-step explanation:
Answer:
(8, 1)
Step-by-step explanation:
When a point undergoes a reflection across the y-axis, it follows the following transformation:
(x, y) --> (-x, y)
(8, 1) --> (-8, 1)
A friend of yours wants to teach a dance class after school. She needs to rent a dance studio to teach the class, and the cost of rent is $400 for 12 weeks. The class will meet each week and your friend will charge each student the same fee for the whole course. Your friend's profit depends on how many students enroll in the course and how much she charges each student.
If your friend charges each student D dollars for the course, define a function, p, that relates the number of students who take the dance course, n, to the profit, p(n).
Answer:
maybe the answer is 157 ok
Una jarra vacia pesa 0.64 kg, llena de agua 1.728 kg. ¿Cuánto pesa el agua?
Answer:
Pesa 1.088kg
Step-by-step explanation:
Peso jarra vacía --> 0.64kg
Peso jarra llena de agua --> 1.728kg
Peso agua = peso jarra vacía - peso jarra llena
Peso agua = 1.728kg - 0.64kg = 1.088kg
Peso agua= 1.088kg
5th one pls help me .....
x² + y² = 6xy
or, (x + y)² - 2xy = 6xy
or, (x + y)² = 8xy
or, (x + y)² = 2³xy
Taking (log) in both sides, we get
log (x + y)² = log (2³xy)
or, 2 log (x + y) = log (2³) + logx + logy
or, 2 log (x + y) = 3 log2 + logx + logy
there hopefuly it help!!!
Express 7.6109 x 10⁸
Answer:
761090000
Step-by-step explanation:
10⁸ = 100000000
7.6109 * 100000000 = 761090000
Answer:
761090000
Step-by-step explanation:
=7.6109×10^8
=761090000
ANS
Set up and solve an equation to find x.
PLEASE HELP
A plane flies at a steady rate of 40 mph while a second plane flies at a steady rate of 100 mph. The planes are 200 miles apart and fly directly toward each other. In how many hours will they meet?
Answer:
1.43 hours
Step-by-step explanation:
Given that:
Speed of plane A = 40 mph
Speed of plane B = 100 mph
Distance between plane A and B = 200 m
In how many hours will they meet?
Recall :
Distance = speed * time
Let the time traveled by each plane = t
Since the total distance apart = 200m
Hence,
Plane A distance + Plane B distance = total distance
40t + 100t = 200
140t = 200
Divide both sides by 140
140t / 140 = 200 / 140
t = 1.4285 hours
t = 10/7 hours or 1.43 hours
The points (5, n) and (4, -4) fall on a line with a slope of 7. What is the value of n?
n =
Submit
Work it out
Answer:
Step-by-step explanation:
The slope of a line can be calculated:
[tex]m = \frac{y_2-y_1}{x_2-x_1}\\[/tex]
We know that the slope is 7, so we want to solve for [tex]y_2[/tex]
[tex]\frac{n-(-4)}{5-4} = 7\\\frac{n+4}{1} = 7\\n+4 = 7\\n = 3[/tex]
What are the roots of the polynomial equation x* – 25x² + 144 = 0?
A -16, -9
В. 4 9
16, 9
D. -4,-3,3,4
look at picture for the question
I will make brainiest whoever has the correct answer!
Answer:
D. all real numbers
Find the values of a, b, and c in the equation
below.
a=
b=
c=
Answer:
x to the 12th power, y to the 3rd power and z to the 11th power
Step-by-step explanation:
Answer:
on edge its
a=12
b=2
c=11
hope this helps
Step-by-step explanation:
Last month, John lost money by selling stocks. His investment income was -\$525−$525minus, dollar sign, 525. This month, John's investment income is \$163$163dollar sign, 163. What does this mean?
Answer:
it means that John GAINED $163 by selling stocks.
Step-by-step explanation:
