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Olin [163]
3 years ago
11

Which transformation preserves only angle measurement? A)dilation B)rotation C)reflection D)translation

Mathematics
2 answers:
Lilit [14]3 years ago
9 0

Ans

A dilation

........,....

pishuonlain [190]3 years ago
8 0

Answer:

A)dilation

Step-by-step explanation:

The transformation preserves only angle measurement is dilation. The  transformation helps in taking up the production of an image that is of the same shape as the main original image.

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Solve the equation 2/3x=-1/2x+5 what is the first step to isolate the variable term on one side of the equation
Komok [63]

Answer:

x= 30/7

Step-by-step explanation:

See image below:)

4 0
2 years ago
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Find the equation, f(x) = a(x-h)2 + k, for a parabola that passes through the point (1,-7) and has (2,- 4) as its vertex. What i
Anettt [7]
The coordinates of the vertex are (h,k)  so we can write:-
 f(x) = a(x -2)^2 - 4
now when f(x) = -7 x = 1 so:-

-7 = a(1-2)^2 - 4
-7 = a - 4
a = -3

so the vertex formula is 
f(x) = -3(x - 2)^2 - 4

standard form:-

f(x) = -3(x^2 - 4x + 4)  - 4
       = -3x^2 + 12x - 16
5 0
3 years ago
2x -6y = 5<br>x+y=2<br>Solve the system of equations.<br>(17, -15)<br>(17/8, -18)<br>no solution​
yan [13]

Answer:

(17/8, -1/8)

Step-by-step explanation:

\left \{ {{2x-6y=5} \atop {x+y=2}} \right.    

the bottom equation is equivalent to x = 2-y

so I switch the value of x in the top equation to x = 2-y

and it becomes 2*(2-y) - 6y = 5

equal to 4 - 2y - 6y = 5

-8y = 1

y = -1/8

then you substitute this value in the second equation

x + y = 2 becomes x + (-1/8) = 2  

x = 2 + 1/8 = 16/8 + 1/8 = 17/8

6 0
3 years ago
Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2500 grams and a standard deviation of 700
const2013 [10]

Answer:

Z-score for 34-week baby = 0.643

Z-score for 41-week baby = 1.154

Baby weight of 41-week is more than the baby weight of 34-week in the gestation period.

Step-by-step explanation:

Given - Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2500 grams and a standard deviation of 700 grams while babies born after a gestation period of 40 weeks have a mean weight of 3100 grams and a standard deviation of 390 grams. If a 34-week gestation period baby weighs 2950 grams and a 41-week gestation period baby weighs 3550 grams

To find - Find the corresponding z-scores. Which baby weighs more relative to the gestation period.

Proof -

Given that,

In between period of 32 to 35 weeks

Mean = 2500

Standard deviation = 700

In between after a period of 40 weeks

Mean = 3100

Standard deviation = 390

Now,

For a 34-week baby,

X = 2950

For a 41-week baby,

X = 3550

Now,

Z-score = (X - mean) / Standard deviation

Now,

For a 34-week baby,

Z - score = (2950 - 2500) / 700 = 0.643

For a 41-week baby,

Z-score = (3550 - 3100) / 390 = 1.154

∴ we get

Z-score for 34-week baby = 0.643

Z-score for 41-week baby = 1.154

As 1.154 > 0.643

So,

Baby weight of 41-week is more than baby weight of 34-week in the gestation period.

4 0
3 years ago
At 6:00 a.m. there were 68 geese in the pond. At 7:30 a.m. There were 50 geese in
Nesterboy [21]

12 geese left per hour. At 7:30 am there were 18 less geese than there were at 6:00 am. Since there was 1.5 hours between each time, and we know that 2/3 of 1.5 hours is 1 hour, we can solve using this equation:

2/3 * 18 = 12.

4 0
3 years ago
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