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tatiyna
3 years ago
7

What is three less than the product of four and the difference of a number and five

Mathematics
1 answer:
lilavasa [31]3 years ago
3 0

Answer: 3-4n-5

Step-by-step explanation: 3-4 times an number-5 is 3-4n-5.

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What are the values of x and y?
Ede4ka [16]

Step-by-step explanation:

In figure:

∠PRT+∠RTP+∠TPR=180

O

(angle sum property of triangle)

⇒x+(180

O

−∠RTQ)+60

O

=180

O

(linear pair)

⇒x+(180

O

−97

0

)+60

o

=180

O

⇒x=31

o

Now, ∠PRT+∠TRQ+∠QRS=180

O

(angle of straight line)

⇒x+48

o

+y=180

O

⇒31

o

+48

o

+y=180

O

⇒y=101

0

3 0
2 years ago
Assume the population has a distribution with a mean of 110 and a standard deviation of 8. For a random sample of size 40, find
VARVARA [1.3K]

Answer:

109.33

Step-by-step explanation:

given that the population has a distribution with a mean of 110 and a standard deviation of 8

Sample size n = 40

Std error of sample mean = std dev/square root of sample size

= \frac{8}{\sqrt{40} } \\=1.265

From std normal distribution table we find that 30th percentile for Z is

-0.5244

Corresponding x score =110-0.5244*1.265=109.33663

30th percentile = 109.33663

=109.33

8 0
3 years ago
In triangle XYZ, A is the midpoint of XY, B is the midpoint for YZ, and C is the midpoint of XZ. Also,
azamat

Answer:

Perimeter of Δ ABC = 7 + 8 + 9 = 24 cm

Step-by-step explanation:

In  triangle Δ XYZ ,

A is the mid point of XY

B is the midpoint of YZ

C is the mid point of XZ

AY = 7

BZ =8

XZ = 18

The mid - point theorem states that,

The segment formed by connecting two mid - points of a triangle is parallel to the third side and half as long

AY = 7 then BC = 7 cm

BZ = 8 then AC = 8 cm

XY = 18 then AB = 9 cm

Perimeter of Δ ABC = 7 + 8 + 9 = 24 cm

8 0
3 years ago
Kelly skated 4 laps in 86 seconds. Which of the following is an equivalent rate of skating?
ikadub [295]

Answer:

D: 10 laps in 215 seconds

Step-by-step explanation:

86/4 = 21.5 seconds per lap

I went through and multiplied each lap number by the time per lap and the last one, D is the right answer!

Have an amazing day!

Please rate and mark brainliest!

3 0
2 years ago
Which of the following is the least? A. 0.105 B. 0.501 C. 0.015 D. 0.15
Naddika [18.5K]
C is the least that is beause it is .015  which is smaller than 0.15
8 0
3 years ago
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