1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Allushta [10]
3 years ago
7

One side of a triangle is 13 feet shorter than the second side. The third side is 1 feet longer than the second side. The perime

ter of a triangle is 45 feet. Find the length of each side
Mathematics
1 answer:
Papessa [141]3 years ago
4 0

Answer:

let second side be x

then first side = x-13

third side= x+1

now

perimeter of triangle = 45

x-13+x+x+1=45

3x=57

x=19

first side = x-13= 19-13=6

third side= x+1=19+1=20

Step-by-step explanation:

You might be interested in
1.45x + 1.25y =70.85 <br><br> x + y = 53
SpyIntel [72]

Answer:

Your answer is

y= 30

x= 23

Mark my answer as brainlist . I need that urgently . Folow me for more answer.

Step-by-step explanation:

6 0
3 years ago
The figure shows a barn that mr fowler is building for his fame
sdas [7]
Where is the figure KingBroski?
3 0
3 years ago
Will give brainliest worth 25 points
dezoksy [38]

Find the difference in temperature between each 1000 feet:

From 1 to 2: 30 - 23.5 = 6.5

From 2 to 3: 23.5 - 17 = 6.5

From 3 to 4: 17 - 10.5 = 6.5

The temperature change is constant as it drops 6.5 degrees for every 1000 foot gain in elevation.

At 5,000 feet the temperature would be : 10.5 - 6.5 = 4

At 6,000 feet: 4 - 6.5 = -2.5

At 7,000 feet: -2.5 - 6.5 = -9

At 8,000 feet: -9 - 6.5 = -15.5

At 8,000 feet the temperature would be  -15.5 degrees.

5 0
3 years ago
Read 2 more answers
A math professor notices that scores from a recent exam are normally distributed with a mean of 61 and a standard deviation of 8
Alexeev081 [22]

Answer:

a) 25% of the students exam scores fall below 55.6.

b) The minimum score for an A is 84.68.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean of 61 and a standard deviation of 8.

This means that \mu = 61, \sigma = 8

(a) What score do 25% of the students exam scores fall below?

Below the 25th percentile, which is X when Z has a p-value of 0.25, that is, X when Z = -0.675.

Z = \frac{X - \mu}{\sigma}

-0.675 = \frac{X - 61}{8}

X - 61 = -0.675*8

X = 55.6

25% of the students exam scores fall below 55.6.

(b) Suppose the professor decides to grade on a curve. If the professor wants 0.15% of the students to get an A, what is the minimum score for an A?

This is the 100 - 0.15 = 99.85th percentile, which is X when Z has a p-value of 0.9985. So X when Z = 2.96.

Z = \frac{X - \mu}{\sigma}

2.96 = \frac{X - 61}{8}

X - 61 = 2.96*8

X = 84.68

The minimum score for an A is 84.68.

8 0
3 years ago
Arrange the steps in the correct order to express cos3x in terms of cosx cos(2x)cos(x)-sin(2x)(x) [1-sin^2(x)]cos(x)-[2sin(x)cos
noname [10]

cos(3x) = cos(2x+x)

= cos(2x) cos (x) -sin(2x)sin(x)

=(1-2sin^2(x)) cos(x)-(2 sin(x) cos(x)) sin(x)

= cos x -2sin^2(x) cos(x) -2sin^2(x) cos(x)

= cos(x) - 4 sin^2(x) cos(x)

cos(x)(1-4sin^2(x))

=cos(x(1-4(1-cos^2(x))

=cos(x)(1-4+4cos^2(x))

= cos(x)-4cos(x)+4cos^3(x)

=-3cos(x)+4cos^3(x)

4 0
3 years ago
Other questions:
  • Stretch, an adult giraffe, weighed 160 pounds when he was born. Now, he weighs 25 times as much! How many tons does Stretch weig
    5·2 answers
  • P(-6,3), Q(-3,9), R(3,6)’
    11·1 answer
  • Captain John Smith earns $3,300 a month in the Air Force. If the Air Force puts 6% into his pension, how much goes into his pens
    9·1 answer
  • Write a number with 4 hundred 9 tens 3 ones
    7·1 answer
  • Which of the following properties was used in the expression shown here? 5(25x-6)=125x-30
    10·1 answer
  • Problem Suppose an archaeologist finds a camel tooth that contains 42 % of original amount of C-14. Find age of the tooth. N = N
    5·1 answer
  • to create an equivalent expression ray said he used commutative property on the following problem. 2x(3x5)=(2x3)x5 true or false
    7·1 answer
  • What is the sale price of a bottle of olive oil originally priced at $6?
    8·1 answer
  • Find the discriminant and describe the nature of the root(s) of the equation: 6x2 - 2x - 4 = 0)
    10·1 answer
  • • Low tide is 1 foot below the average water level.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!