Answer:
. Simplify: (4x2 - 2x) - (-5x2 - 8x).
Solution:
(4x2 - 2x) - (-5x2 - 8x)
= 4x2 - 2x + 5x2 + 8x.
= 4x2 + 5x2 - 2x + 8x.
= 9x2 + 6x.
= 3x(3x + 2).
Answer: 3x(3x + 2) Step-by-step explanation:
help!!
Show that 1 + tan2(x) = sec2(x)
Answer:
tan2(x) + 1 = sin2(x)/cos2(x) + 1 = [sin2(x) + cos2(x)]/cos2(x) = 1/cos2(x) = (1/cos(x))2 = sec2(x). Thus tan2(x) + 1 = sec2(x).
Step-by-step explanation:
Answer: Not an identity
Step-by-step explanation:
Rewrite the following without an exponent. (9/5^-2)
Answer:
225
Step-by-step explanation:
5^-2 can be rewritten as 1/25.
Then we can divide 1/25 by 9. 9/(1/25)= 225
A tree outside Dave’s house is 12 feet tall
Answer:
wheres the reszt of the question?
Step-by-step explanation:
A television network wanted to estimate the proportion of a one-hour time slot that is made up of commercials. The network took random samples of
10
10 one-hour time slots. The following are the sample proportions the network found in
12
12 samples.
Part A
What is the estimated proportion of commercials in all one-hour time slots? Round your answer to the nearest thousandth.
Answer:
120
Step-by-step explanation:
Remember, always round sample size up, regardless of the decimal part. Answer: To find a 95% CI with a margin of error no more than ±3.5 percentage points, where the true population proportion is around 42%, you must survey at least 764 people. 10×764 = 7640; presumably the electorate is larger than that. So, then 10 × 12 = 120
Which of the following expressions represents the value, in dollars, of a certain number of dimes, d, and pennies, p?
Answer:
If your answer choices are:
0.01d + 0.10p
0.10d + 0.01p
0.11dp
0.11d + p
A dime is 10% of a dollar and a penny is 1% of a dollar, or 0.10 and 0.01
Then 0.10d + 0.01p is the expression
Hope this helps!
12-6.5 also i need help with a scenario and with a word problem the scenario is the photo i put and with two word problems ramona sees that her cat hasn"t been eating and wants him to gain more weight. If the cat weighs 6.78 pounds and the goal weight is 10.5 lbs, how much weight does Ramona want her cat to gain? these are two separate problems. Jessica is running a 5k which is about 3.1 miles at a charity event. She starts slowing down around 1.75 miles into the race. How much farther does Jessica have before reaching the finish line?
Answer:
The cat needs to earn 3.72 pounds
Jessica has 1.35 miles to earn in the race.
Step-by-step explanation:
Find the volume of the sphere.
Either enter an exact answer in terms of 7 or use 3.14 for I and round your final answer to the nearest hundredth.
units
Answer:
Volume of the given sphere = 4.19 units³
Step-by-step explanation:
Volume of a sphere is given by the expression,
V = [tex]\frac{4}{3}\pi r^{3}[/tex]
Here, r = radius of the sphere
From the picture attached,
Radius of the sphere 'r' = 1 unit
Volume of the given sphere = [tex]\frac{4}{3}\pi (1)^3[/tex]
= [tex]\frac{4}{3}\pi[/tex]
= [tex]\frac{4}{3}(3.14)[/tex]
= 4.187
≈ 4.19 units³
01. En una piscigranja el 30% de boquichicos es el 20% del número de carachamas. Si sólo hay boquichicos y carachamas. ¿Qué porcentaje del 80% del total es el número de boquichicos? A) 30% B) 50% c) 40% D) 60% E) 25% 02. Se sabe que un libro de de Psicología es más caro que uno de Inglés; uno de Matemática más caro que uno de Historia, pero más barato que uno de Psicología. ¿Cuál es el más caro? A) Psicología B) Historia C) Matemática D) Inglés E) No se puede determinar 03. Calcular la cantidad total de esferas en el siguiente arreglo triangular. A) 4950 B) 5000 C) 4850 D) 5050 E) 5151 04. Calcular "E" y dar como respuesta la suma de sus cifras. A) 900 B) 1200 c) 1800 D) 2700 E) 9990
Answer:
0.1. B) 50%
0.2 A) Psicología
Step-by-step explanation:
01. Dejemos que 'x' e 'y' representen el porcentaje de boquichicos y carachamas en la piscifactoría, tenemos;
Dado que el 30% de los boquichicos es el 20% del número de carachamas
30% x = 20% y
∴ 0.3 · x = 0.2 · y
Por lo tanto, tenemos;
x / y = 0,2 / 0,3 = 2/3
Por lo tanto, por cada 100% de pescado, tenemos;
x + y = 100%
x = 2/3 · y
2/3 · y + y = 100%
5 · años / 3 = 100
y = 100 × 3/5 = 60%
El porcentaje de carachamas en la finca, y = 60%
∴ x = 100% - y = 100% - 60% = 40%
El porcentaje de boquichicos en la finca, x = 40%
Por lo tanto, tenemos el 80% del pescado en la granja, obtenemos;
Si hay 100 peces en la granja, 80% = 80 peces
Pero el número de los 100 peces que son boquichicos en la granja = 40% × 100 = 40 peces
Por lo tanto, los boquichicos son la mitad del 80% del número de peces o el 50% de los peces en la piscifactoría.
La opción correcta es;
B) 50%
02. Tenemos;
El costo de un libro de psicología> El costo de un libro en inglés
El costo de un libro de matemáticas> El costo de un libro de historia
El costo de un libro de psicología> El costo de un libro de matemáticas
Por lo tanto, tenemos;
El costo de un libro de psicología> El costo de un libro de matemáticas> El costo de un libro de historia
∴ El libro de Psicología es más caro que todos los demás libros y, por tanto, es el libro más caro
La opción correcta es;
A) Psicología
[tex]23 1/5 in to percentAGE
The price of a watch was increased by 20% to £198.
What was the price before the increase?
Answer:
$165 Hope this helps! May I have brainliest? I need to level up?
Step-by-step explanation:
To find the original price before the increase, divide the new price by 1 + the percent of increase.
198 / 1.20 = 165
The original price was $165
James joins Club one which charges a monthly membership of 19.99 how much will James spend in all if he continues his membership for six months
Write a positive or negative integer that represents the situation. You earn $15 raking leaves. The integer represents the situation.
Answer:
+$15
Step-by-step explanation:
Amount earned for raking leaves = $15
Representing the amount earned above. As a positive or negative integer will depend on what the money is used for or stands for.
Amount earned for working adds to one's wealth while expenses will be represented as negative as it decreases the amout one has ;
Hence, integer ; +$15
The customer saves $.96 by using a coupon. The coupon takes 30% off the original price of the serial. What is the original price of the box of cereal?
Confused!! Please answer!!
A quadratic function f models the predicted population growth in Town F after x years. An exponential function g models the predicted population growth in Town G after x years. Use the table to compare the average rate of change for each function from x = 1 to x = 3. Which function has a greater average rate of change over this interval? Enter either f or g in the box.
Answer: g
Step-by-step explanation:
Answer:
g(x)
Step-by-step explanation:
i took the test
the polynomial y = x^{5} + x^{3} - x^{2} - 1 factors into (x^{2} + 1) (x^{3} - 1). what is the multiplicity of the root (x^{3} - 1)?
Answer:
The multiplicity of the root is 1
Step-by-step explanation:
Firstly, we need to understand what multiplicity is
By multiplicity, we simply refer to the number of times we have the certain root repeating itself
From the factorization, each of the given roots were only repeated once
That indicates that the given multiplicity is 1
1. Find the missing reference angle using arcsin, arccos, or arc tangent. (Round to
the nearest whole number)
39
10
1?
Your answer
Answer:
15°
Step-by-step explanation:
Reference angle = [tex] \theta [/tex]
Side Opposite to reference angle = 10
Hypotenuse = 39
Let's use arcsin:
recall: SOHCAHTOA
Therefore:
[tex] \theta = sin^{-1}(\frac{Opp}{Hyp}) [/tex]
Substitute
[tex] \theta = sin^{-1}(\frac{10}{39}) [/tex]
[tex] \theta [/tex] = 14.8571655° = 15° (to nearest whole number)
yoo i got a paper due tmrw if anyone could answer this that’d be bomb thank u
x/8- 3/4=5/8 , solve the equation for x
I need help with this question, plsssssssss
Answer: 60 also your welcome
Use the information given to enter an equation in standard form.
(5, 12) and (4, 10) are on the line.
DESPERATE FOR ANSWER
Answer:
2x - y = -2
Step-by-step explanation:
[tex]m=\frac{y^2-y^1}{x^2-x^1}[/tex]
[tex]m = \frac{10-12}{4-5} =\frac{-2}{-1} =2[/tex]
[tex]10=2(4)+b\\10=8+b\\2=b\\y=2x+2\\2x-y=-2[/tex]
PLS HELP ASAP WILL GIVE BRAINlEST AND 100 POINTS
A bus travels from town A to town B. If the bus's speed is 50 km/hr, it will arrive in town B 42 min later than scheduled. If the bus increases its speed by \displaystyle \frac{50}{9}
9
50
m/sec, it will arrive in town B 30 min earlier than scheduled. Find:
A) The distance between the two towns;
B) The bus's scheduled time of arrival in B;
C) The speed of the bus when it's on schedule.
Answer:
60 km/hr
Step-by-step explanation:
First we will determine the speed of the bus following it's increase. The speed is increased by:
50m/9sec=50.60.60/9/1000 .km/hr=20 km/hr
Therefore, the new speed is V = 50 + 20 + = 70
km/hr. If x is the number of hours according to the schedule, then at the speed of 50 km/hr the bus travels from A to B within ( x + 42/60 ) hr. When the speed of the bus is V = 70 km/hr, the travel time is x -30/60 hr. Then:
50(x+42/60)=70(x-30/60)
5(x+7/10)=7(x-1/2)
7/2+7/2=7x-5x
2x = 7
x=7/2 hr
So, the bus is scheduled to make the trip in 3 he 30 minutes.
The distance between the two towns is 70 ( 7/2 – 1/2 ) = 70 • 3 = 210 km and the scheduled speed is:
270/7/2=60km/hr
Find x. Hypotenuse would be 16 and opposite would be y and x would be adjacent
Answer:
x= 6.762° y= 14.501°
Step-by-step explanation:
remember if you don't have the missing angle adjacent(side) to the right angle, it wont work. If you ever need to find it, tell me.
Jeff wants to upgrade the entertainment center. The price of a television was reduced from $2, 500 to $2,000. By what percentage was the price of the television reduced?
HELP WHAT WHATS THE EQUATION
Answer:
p=17+6h
Step-by-step explanation:
Plz help ASAP I will mark u branliest
Solve for m:
598 + 15.75m < 850
Answer:
m < 16
Step-by-step explanation:
598 + 15.75m < 850
15.75m < 850 - 598
15.75m < 252
m < 16
You need at least $48,000 in two years. If you earn 4.8% compounded annually, how much principle do you need to invest?
Answer:
488305
Step-by-step explanation:
100 plus 4.8 percent then add 4.8 percent gets you 109.83
then apply 9.83 percent to random numbers in a calculator
Show all of your work. Simplify the expression: - 3a + 7 + 5a
Answer:
2a + 7
Step-by-step explanation:
-3a + 7 +5a
subtract the negative 3 from the 5
2a + 7
Answer: it would be 2a+7
Step-by-step explanation: Hope this help :D
How can you translate words into equations?
Answer:
try to look out for words such as more than, less than, twice as much, half as much, in addition to, took away something, etc
Step-by-step explanation:
hope this helped!
Write the equation of the line passing through point (-2 - 2) with a slope of -1
Substitute into y = mx + b and for b
What is the vertex of y = x2 + 4x – 7?
O(-4,-7)
O (2, 5)
0 (-2, -19)
0 (-2, -11)