Which expression is equivalent to (7-8)(73)?
Answer:
The answer would be -73
Answer: 7^-5
Step-by-step explanation: I did it
What is the solution for -2x + 7 = 7
Answer:
X = 0
Step-by-step explanation:
Step 1: Subtract 7 from both sides.
−2x+7−7=7−7
−2x=0
Step 2: Divide both sides by -2.
−2x
−2
=
0
−2
x=0
Hope this helps!
Need help please and thank u
Answer:
Step-by-step explanation:
I am stuck on the same thing, but A is probably the number of songs increse when lenght of cd increses.
3) An old pump can fill a swimming pool in 9
hours. If a new pump was being used with the old
pump they could fill the pool in 3 hours. How
long would it take to fill the pool with just the new
pump?
clear
worl
long
5.
r
Answer:
6 hours
Step-by-step explanation:
old = 9
old + new = 3
3 - new = old
3 - new = 9
9 - 3 = new
new = 6
g The distribution of heights of 7-year-old girls is approximately normally distributed with a mean of 47.7 inches and a standard deviation of 2.4 inches. Amy is 7 years old, and her height is 1.34 standard deviations above the mean. Her friend Sophia is also 7 years old and is at the 94th percentile of the height distribution. a. At what percentile is Amy's height? Draw and label the Normal model that corresponds to this situation. b. How does her height compare to Sophia's? c. What percent of 7-year-old girls would you expect to be taller than 49.4 inches? Draw and label the Normal model that corresponds to this situation. d. Below what height are the shortest 30% of 7-year-old girls? Draw and label the Normal model that corresponds to this situation.
Answer:
a) 90th percentile
b) X = 51.43 ( Sophia's height ) , Amy's height = 50.92
c) 0.2394
d) 46.44 inches
Step-by-step explanation:
mean value( u ) = 47.7 inches
std ( σ )= 2.4 inches
Amy height = 1.34 std above mean value
Sophia height = 94th percentile of height distribution
A ) what percentile is Amy's height
To Calculate the percentile of Amy's height
P( X ≤ 50.916 ) = P( (X-µ)/σ ) ≤ (50.916-47.7) /2.4)
=P(Z ≤ 1.340 ) = 0.9099 = 90th percentile
B) How Amy's height compare to Sophia's
The proportion given based on Sophia's height = 0.94
z -value at the proportion ( 0.94 ) = 1.55 ( from excel )
note z-value can be calculated using = ( x - µ ) / σ
therefore: X (Sophia's height ) = zσ + µ= (1.55 * 2.4) + 47.7
X = 51.43 ( Sophia's height ) , Amy's height = 50.92
C) percentage expected to be taller than 49.4 inches
P ( X ≥ 49.40 ) = P( (X-µ)/σ) ≥ (49.4-47.7) / 2.4)
= P(Z ≥ 0.708 )
= P( Z < -0.708 )
= 0.2394
D) Below what height are the shortest 30% of 7-year old girls
( u ) = 47.7 inches
std ( σ )= 2.4 inches
given proportion = 30% = 0.3
The z value at 0.3 = -0.52 ( from excel )
to calculate for X ( height ) we have to apply the formula used to determine z value
z= (x-µ) /σ
hence : X = (Z * σ) + u = (-0.52 * 2.4 ) + 47.7
X = 46.44
below 46.44 inches lies about 30% of 7 year old girls height
simplify by combining like terms
Answer:
31b2 subtract 16b2
Step-by-step explanation:
Add and then subtract the numbers
A scientist needs 10 liters of a 20% acid solution for an experiment, but she has only a 5% solution and a 40% solution. To the nearest tenth of a liter, about how many liters of the 5% and the 40% solutions should she mix to get the solution she needs?
A) Choose the equation to match the situation.
A. (0.20)(10) = 0.05x + 0.40x
B. (0.20)(10) = 0.05x + 0.40(10 – x)
C. (0.20)(10) = 0.05(10) + 0.40(10 – x)
D. (0.20)(10) = 0.05(10 – x) + 0.40(10 – x)
B) Solution
??? liters of 5%
??? liters of 40%
Please Help! :)
Instructions: Using the following image, complete the statements below.
Step-by-step explanation:
1. DEC
2. BEC
3. 180°
4. 180°
hope this helps
What represents 5. X=15
Answer:
X=3
Step-by-step explanation:
5x3=15
What's the best definition of the word "ratio?"
Answer:
Compare
Step-by-step explanation:
Or relation I believe so...
Answer:
In mathematics, a ratio indicates how many times one number contains another. For example, if there are eight oranges and six lemons in a bowl of fruit, then the ratio of oranges to lemons is eight to six (that is, 8∶6, which is equivalent to the ratio 4∶3). Equal quotients correspond to equal ratios.
HOPE YOU UNDERSTAND!!!HELP!!!!!!! MATH QUESTION FOR 40) POINTS!!!!!!
Abe is buying wrapping paper.
He is shopping for the best deal.
Drag the rolls of wrapping paper in order from the least to the greatest unit cost in dollars per square foot. (Just put from least to greatest)
Red: 12.5 square feet for $1.79
Blue: 40 square feet for $5.29
Green: 50 square feet for $8.49
Orange: 60 square feet for $6.00
Answer:
1)Green
2)Red
3)Blue
4)Orange
Can anyone help me???
Answer:
Maybe option B. 8^8
I am not sure though..
Answer:
the answer should be B
Step-by-step explanation:
A local business does $1200 in sales on Monday and $1400 dollars in sales on Tuesday. Which of the following a correct sentence to describe the ratio of Monday to Tuesday?
Answer: The amount of money that he made on Monday is 0.86 times the amount of money that he made on Tuesday
Step-by-step explanation:
We know:
Monday = $1200
Tuesday = $1400
Now we want to know the ratio of Monday to Tuesday, that is a relation that directly relates both quantities, we can calculate it as:
Ratio from Monday to Tuesday = Monday/Tuesday = $1200/$1400 = 0.86
Then the amount of money that he made on Monday is 0.86 times the amount of money that he made on Tuesday
Estimate the sum to the nearest tenth 8.741+2.165
Answer:
10.9
Step-by-step explanation:
8.741 is estimated to 8.7 and 2.165 is estimated to 2.2 so the estimated answer would be 10.9
Answer:
10.9
Step-by-step explanation:
he's always right every question i search up
he is always on here thanks so much brainly
use you deserve brainliest to be honets
What are rational numbers
Answer:
In mathematics, a rational number is a number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. Since q may be equal to 1, every integer is a rational number.
Step-by-step explanation:
There are 5 customers currently present in a coffee shop. Three of the customers are waiting in line at the front register. How
many different lines of customers are possible?
6
10
60
120
Answer:
60
Step-by-step explanation:
Edge
Answer:
C.
Step-by-step explanation:
60
Giving 100 PONITS and i MARK BRAINLIEST the question is in the picture provided!
Answer:
a
Step-by-step explanation:
pi r 2
459.96 / 4
22.5 times 11.5
add up
Answer:
I think the answer is A
Step-by-step explanation:
I am so so so sorry if I am wrong!!
What’s the explicit rule for the sequence 9,14,24,...
Answer:
f(n) = 5n(n -1)/2 +9
Step-by-step explanation:
The rule will depend on what kind of sequence you think this is. An infinite number of rules can be dreamed up that will give these three values.
The simplest polynomial rule is one of 2nd degree. We know this because the first differences are 14-9 = 5 and 24-14 = 10, so are not constant. Only three values are given, so only a polynomial of degree 3-1=2 can be specified by these points.
If we say the polynomial is ...
f(n) = an^2 +bn +c
Then the three given points give rise to three equations:
9 = a + b + c
14 = 4a +2b +c
24 = 9a +3b +c
Solving these by your favorite method gives ...
a = 5/2, b = -5/2, c = 9
So an explicit polynomial rule can be written as ...
f(n) = 5n(n -1)/2 +9
_____
Additional comment
A sequence such as this one can also be described by an exponential rule. Here's one that describes these points:
f(n) = 5·2^(n-1) +4
The fact that the first differences (5, 10) are related by a factor of 2 suggests 2 as the base of the exponent.
10q - 20 is equivalent to _____.
Answer: 10q-20
10(q-2)
factor out 10 as it is a common factor
Step-by-step explanation: this did not help please comment to contact please
Gail pays 0.04 sales tax on each dollar she spends. If she buys a new bike for 137.32 how much sales tax will she pays ?
Answer:
$5.49
Step-by-step explanation:
Basically we can take the price of the bike, 137.32, and multiply by the tax, 0.04, to get 137.32*0.04 and we are left with 5.4928 and we round to 5.49.
Answer:
Gail's sales tax amount is $5.49
[Will Mark Brainiest Answer]
What is (4.81*10^16)(1.1*10^-4)
Answer:
5.291e+12
Step-by-step explanation:
Step-by-step explanation:
5.291e+12 would be your answer my guy
HELP ASAP PlEASE
The actual length of mermaid avenue is 90m and the scale is 1cm to 30m. What is the distance in the scale drawing using this scale?
Which is a correct two-column proof?
Given: ∠h and ∠c are supplementary.
Prove: j || l
Answer:
Third option is the correct answer.
Step-by-step explanation:
Third option is the correct answer.
find the value of x.
Answer:
23
Step-by-step explanation:
3x + 18 + 93 = 180
3x + 111 = 180
3x = 69
x = 23
l(x) = 2|3 – 2x| +6; find l(5)
Answer:
5 = a whole big mac right so if you get a triple big mac divide the big mac to the other one
Step-by-step explanation:
Which point on the number line below is 57 the distance from D to A?
Answer:
C
Step-by-step explanation:
The answer is c because the distanse from D to a is 7, and 5/7 of 7=5
,and -3+5=2=c.
Please do all problems for brainlest!
Answer:
1) GCF(12,32) = 4
2) lcm(12, 32) = 96
3) GCF 6,12,21 = 3
4) LCm 6,12,21 = 84
Answer:
1) 4
2) 96
3) 3
4) 36
Find the distance between GH
Answer:
4.2 cm
Step-by-step explanation:
The red mark between each points in the line segment shows that FG, GH, HJ, and JK are all equal in proportion. Since all 4 segments are of equal distance, the distance of any of the segments would be: [tex] \frac{16.8}{4} = 4.2 [/tex].
Therefore, distance between GH is 4.2 cm.
(5x3 - 8x? – X – 4) = (x-2)
Answer: x= 1.4 Hope this helps with your assignment.
Why is the equation for Newton's Law of Gravitation negative?
a. The negative sign indicates the force is made by mass
b. The negative sign cancels out the negative sign of the gravitational constant
c. The negative sign indicates the strength of the force
d. The negative sign indicates that the force is always attractive (THIS ANSWER IS CORRECT)
Answer:
gravitational force of attraction between two positive mask or two negative mass and repulsive between one negative into positive minus negative sign only appears when the force is acting in the opposite direction when considered the direction.
Answer:
D) The negative sign indicated the force is always attractive
