Answers
Answer:
-6/16
Step-by-step explanation:
Just multiply the top and bottom by 2.
Answer:
(-3/8)
Step-by-step explanation:
Related Questions
A middle school principal wants to change the lunch menu at the school. The principal surveys
the students to determine how the students would feel about the changes. Which survey
method will best produce the representative sample?
Answers
PLEASEEE i REALLY need help!! This is due tonight!!
1. Think of two things that you can measure. Give one that requires high precision, or a low level of uncertainty. Give another that can have lower precision, or a higher level of uncertainty.
2. Explain why you made your choices. Why does one measurement need to be more precise than the other?
Answers
Problem 1
Two things you could measure is a person's height and the speed needed to reach the planet Mars. The person's height can be measured with a low level of precision, which means we don't need to be that accurate. We could say "that person is about 6 feet tall" and whoever is listening would get a sense of their height. In contrast, we need high precision for a rocket speed to Mars because getting this figure wrong would likely cause disaster down the road. Very complicated mathematics is essential to make sure we hit the target required in space.
===============================================
Problem 2
As mentioned, we need high precision when it comes to anything dealing with space travel. If the calculations are wrong, then the spacecraft could crash somehow. As one example where things went wrong, engineers used the wrong values and the Mars lander ended up crashing into the planet rather than landing safely. The high cost of such space exploration missions means that it's very crucial to get precise values as much as possible, to as accurate as possible. Things like discussing a person's height isn't that essential to be very precise as we can just relay estimates to whoever we're talking to. This informal setting doesn't demand as much accuracy compared to something like a rocket launch.
A match box dimension is 4cm×2.5cm×1.5cm.What will be volume of a packet containing such 6 match boxes?How many such packets can be placed in a cardboard box whose size is 60cm×30cm×24cm?
Answers
You can fit 2,880 match boxes in the cardboard box which is 43,200cm
Inscribed angles!!
Find A, B, and C
Answers
sum of all exterior angles equals to 360
sum of interior angles equal to 180
divide 360 by 122 to find b the rest you'll get it
as you go further in the question
Kelly tiene algo de dinero ahorrado. Después de cortar el césped el sábado, agrega $ 40 a sus ahorros. Escribe una expresión para representar cuánto dinero ha ahorrado Kelly
Answers
Answer:
x + 40
Step-by-step explanation:
Con la informacion de la pregunta vemos que Kelly tiene una cierta cantidad de plata ahorrada. Este ahorro se puede demonstrar con la variable x. Despues de completar su trabajo le pagaron $40 y los agrego a sus ahorros. Entonces simplemente tenemos que sumar los $40 a los ahorros que ya tenia (x). Esto nos dara la cantidad nueva de sus ahorros
x + 40
describe and correct the error in solving the proportion?
Answers
Answer: Choice B
They did not perform the cross multiplication properly
The correct step should be m*24 = 8*15 which solves to m = 5
========================================================
Explanation:
In general, if we had the equation A/B = C/D, then it cross multiplies to A*D = B*C. We refer to this as cross multiplication because of the shape made when we connect the terms (to figure out what multiplies with what). The diagram below shows what I mean.
So that's why m/8 = 15/24 cross multiplies to m*24 = 8*15
Simplifying things a bit leads to 24m = 120. Then we divide both sides by 24 to fully isolate m and we get m = 120/24 = 5. Therefore, m = 5.
plz help me with this asap
81x^2 − 49y^2
Factorize each completely
1. y^2 − 1
2. x^2 − 2^2
3. x^2 − 4y^2
4. x^2 − 25b^2
5. 36 − 9m^2
6. 36a^2 − 169x^2
7. 81x^2 − 49y^2
8. 49r^2 − 16s^2
9. 144x^2 − 49
10. 64x^2 − 25
11. 81a^2 − 64b^2
12. 1 − 16x^2
13. 49x^2 − 1
14. (a + b)^2 − 2^2
15. (a − b)^2 − 1
Answers
Answer:
i will answer THIS.. just give me some time
how to find the angle?
please help I'll give BRAINIEST
** if there is two responses **
Answers
Answer:
m∠CDE = 37°
Step-by-step explanation:
Since, AB║CD and AC is a transversal line.
∠EAB ≅ ∠ECD [Alternate interior angles]
m∠EAB = m∠ECD = 25°
m∠CED + m∠AED = 180° [Linear pair of angles]
m∠CED + 62° = 180°
m∠CED = 180° - 62°
= 118°
By triangle sum theorem In ΔCDE,
m∠CED + m∠CDE + m∠ECD = 180°
118° + m∠CDE + 25° = 180°
m∠CDE + 143° = 180°
m∠CDE = 37°
PLEASE HELP
Sit-up
Push-up
Plank
Arm
circles
V-stretch
which event has a theoretical probability
of?
A. spinner landing on either sit-up
or V-stretch
B. spinner landing on push-up
c. spinner landing on either sit-up.
plank, or arm circles
D. spinner not landing on sit-up
Answers
Answer:
A
Step-by-step explanation:
Answer A has two of the five possibilities, and each section is equal so there is an equal probability for each. Add up the two possibilities for 2/5.
Juan sells a boat that he bought 5 years ago. He sells it for 60% less than he originally paid for it. If the original cost is b, write an expression that shows how much he sells the boat for
Answers
Answer:
b - 0.60b
= 0.40b
Step-by-step explanation:
The expression would be
here the original cost is b
And Juan sells it for 60% less than original price
So the expression is
= b - 0.60b
= 0.40b
This would be the expression that shows the selling price of the boat
help a dude out lol this is overdue
Answers
Answer:
5
Step-by-step explanation:
The right angle is 5 so that means the x is 5
Answer:
5
Step-by-step explanation:
9+6=15, 3*3=9 3*5=15 so the answer for x is 5
Graph the function represented in the table on the coordinate plane
(-2,-3), (-1,-1), (0,1) (1,3) (2,5)
Answers
Hello, the graph sould be like this. Just remember, if you want to draw a graph, you should know the x and y state. x is from left and y is from right.
A restaurant bill is $84.97 estimate a 20% tip
Answers
Answer: A 20% tip of $84.97 is $12.75 the total would then be $97.72
Step-by-step explanation:
Which of the following is an example of natural selection?
A) Hummingbirds drinking nectar from a plant.
B) Whales and dolphins swimming to the water’s surface to breathe.
C) Sloths making their homes high in trees to protect themselves from predators.
D) Brown-colored lizards surviving and reproducing because they are better able to camouflage themselves from predators.
Answers
Answer:
A) Hummingbirds drinking nectar from a plant.
Step-by-step explanation:
Here are some examples of natural selection: In a habitat there are red bugs and green bugs. The birds prefer the taste of the red bugs, so soon there are many green bugs and few red bugs. The green bugs reproduce and make more green bugs and eventually there are no more red bugs.
Sally's dance school had 60 students last year. This year there are only 48 students enrolled. By
what percent did the enrollment decrease? Show all of your work to justify your answer.
Answers
Answer:
20%
Step-by-step explanation:
60-48=12
changed ÷ original x 100%
= 12 ÷ 60 x 100%
= 20%
The population of a certain animal species decreases at a rate of 2.5%. If there are 400 of this animal in the wild, using an exponential function, predict approximately how many there will be in 4 years. Round to the nearest whole number.
Answers
Answer:
20 years
Step-by-step explanations:
You just do the work and figure it out and it gives you the answer of 20 years
Find the missing value. Hint: Use the number line to find the missing value. -7= -(-2)
Answers
Answer:
-9
Step-by-step explanation: I know this problem since I use khan academy too and I got the answer wrong and it helped by saying it was -9.
if i have 7 quarters, 13 nickles, 23 pennies, 6 dimes and two dollar bills, how much money do i have
Answers
Answer:
$5.23
Step-by-step explanation:
(7x.25)+13(.05)+.23+6(.10)+2.00=1.75+.65+.23+.60+2.00=$5.23
Answer:
$5.23
Step-by-step explanation:
7 quarters: $1.75
13 nickels: $0.65
23 pennies: $0.23
6 dimes: $0.60
2 dollar bills: $2
Total: $5.23
z varies jointly with x, and y, and z=7 when x= 2, y= 2
Answers
Answer:
56
Step-by-step explanation:
Complete question:
Z varies jointly with x and y , x=2 and y=2, z=7. Find z when x=4 and y=8 using joint variation . (I need the problem worked out step by step)
If z varies jointly with x, and y, this is expressed as;
z = kxy
If z=7 when x= 2, y= 2
7 = k(2)(2)
7 = 4k
k = 7/4
To get z when x= 4 and y = 8
z = kxy
z =7/4 (4)(8)
z = 7*8
z = 56
Hence the value of z is 56
Find the area of the base of a box of height 4cm and lateral surface area 120cm.sq if its length is twice its breadth.
Answers
Answer:
The area of the base of a box is 1800 cm².
Step-by-step explanation:
We have:
H: is the height = 4 cm
[tex]A_{l}[/tex]: is the lateral surface area = 120 cm
L = 2B
We can find the breadth of the base by using the lateral surface area and the height:
[tex] A_{l} = H*B [/tex]
[tex] B = \frac{A}{H} = \frac{120 cm}{4 cm} = 30 cm [/tex]
Now, if the length is twice its breadth we have:
[tex] L = 2B = 2*30 cm = 60 cm [/tex]
Hence, the area of the base is:
[tex] A_{b} = B*L = 60 cm*30 cm = 1800 cm^{2} [/tex]
Therefore, the area of the base of a box is 1800 cm².
I hope it helps you!
You have a sack of 90 balls. 35 blue, 30 green and 25 pink. If you randomly pull one ball out of the bag, what is the probability of pulling a green ball?
Answers
Answer:
P(Green ball) = 1/3
Step-by-step explanation:
You have a sack of 90 balls. 35 blue, 30 green and 25 pink. If you randomly pull one ball out of the bag, what is the probability of pulling a green ball?
The Probability of pulling a green ball =
P(Green ball) =
Number of green balls/ Total number of balls
= 30 green balls/90 balls
P(Green ball) = 1/3
hi please help me with this i’ll give brainliest if you give a correct and show your work!
Answers
1.35
x. .42
________
270
5400
________
.5670
You need to have the total number of decimal places from the original two numbers. 1.35 has two decimal places and .42 has to decimal places you have a total of four decimal places, Which means 5670 is .5670
2. (.22)x(.04)
.22
x. .04
_______
88
00
_______
.0088
you need to have the total number of decimal places from the original Two numbers. So .22 is two decimal places and .04 is two decimal places, so you will need to have for decimal places. That means that the answer 88 needs to be translated into .0088
In a survey of U.S. Adults, 16% say they have had someone take over their email accounts without their permission. You randomly select 250 U.S. Adults and asked them whether they have had someone take over their email accounts without their permission. Find the probability that the number of U.S. Adults who say they have had someone take over their email accounts without their permission is : a. At most 40 b. Less than 45 c. Exactly 48
Answers
Answer:
a. At most 40
Step-by-step explanation:
If we take the survey that was done as a basis then we would use the 16% that was obtained as the number of overall US adults that have had their accounts used without their permission. Assuming that the 250 selected individuals were selected at random and without bias then those 250 would also be representative of the entire population. Therefore, we would simply need to multiply the number of selected individuals by the percentage in decimal form.
16 / 100 = 0.16
250 * 0.16 = 40
Finally, we can see that roughly 40 individuals would have had their email used without permission.
what is the height of the waterfall? WILL MARK BRAINLIST FOR CORRECT ANSWER.
Answers
Answer:
11 ft
Step-by-step explanation:
mark me as brainliest
the options are:
greater than..
less than..
less than or equal to..
greater than or equal to.. plz help
Answers
Answer:
P is greater than -8
P is less than -5
When the circle is hollow that means its never equal to
When the circle is full it means its equal to
it matters which direction the line is going
if it goes to the right and it is hollow that it is greater than
if goes to the left and it is hollow it is less than the number the circle is on
If the circle is full when it goes to the right then that means its greater than or equal to from the number its going from
same thing to the left
please help me ( show ur work it’s multiple choice ):)
Answers
can someone plz help me
Answers
Answer:
x is less than or equal to negative 14.
Step-by-step explanation:
so for now we should pretend that the greater than or equal to is an equal sign, and simplify the problem to get x alone on a side
remove 5 from each side
-x/3=1/3-5
-x/3=14/3
multiply both sides by 3
-x=14
x=-14
so we can now replace the equal sign with the equal or greater to, so x is less than or equal to -14
Alaina needs to sell 225 boxes in order to be the top seller. She sells thin mints and samoas to all of her customers for a total of $628.00 in sales. The thin mints sell for $3.00 each and the samoas sell for $2.50 each. Which system of equations below could be used to find how many boxes of thin mints and samoas were sold?
Answers
Answer:
94 boxes of samoas
131 boxes of thin mints
Step-by-step explanation:
m=mints
s=samoas
s+m=225 m=225-s
s(2.5)+m(3)=628
2.5s+3m=628
substitute for m
2.5s+3(225-s)=628
2.5s+675-3s=628
reduce
-0.5s=-47
s=94
m=131
Plz help me get the right answer
Answers
Answer:
Sum is the addition -8x^2+3-9x^2+3x-3 Combine like terms -17x^2+3xA cell phone company offers two plans for unlimited calling. The first plan has a monthly charge of $25 and 8.08 per text message. The second plan has a monthly charge of
$20 and $.12 per text message. For how many tect messages would the two plans have an equal cost? (What is the solution to this system? X represents the #of text
messages and represents the total costs)
• 66
• 175
• 125
• they will never cross
Answers
Firstly the best thing to do is create two different equations.
1. y=25+.08x
2. y=20+.12x
Then you plug into Desmos and see at what point they cross. They cross at (125, 35).
Therefore for 125 text messages would cost 35$ for each plan.