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2 years ago

30 points

Mathematics

1 answer:

s2008m [1.1K]2 years ago

7 0

Answer:

A: You plot these points (-3,4) (-3,6) (-5,6) (-7,4)

B: The transformation would be described as a reflection over the y axis

C: The transformation does result in a congruent figure because the shape doesn't change in size or shape and in length or width

Step-by-step explanation:

So our plots from the figure are: (3,4) (3,6) (5,6) (7,4)

So using the rule (x, y) → (-x, y) are new points would be:

(-3,4)

(-3,6)

(-5,6)

(-7,4)

This rule (x, y) → (-x, y) is used for the type of transformation that is a reflection but over the y axis.

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Two percent of Jennies skin cells were burned when she escaped from a fire. If

andreev551 [17]

$1.813*10^{12}$ cells of Jennies skin were not burned.

Step-by-step explanation:

Given,

Burned skin cells = $3.7*10^{10}$

This represents 2% of total skin cells.

Let,

x represents the total number of skin cells.

2% of x = $3.7*10^{10}$

$\frac{2}{100}x=3.7*10^{10}\\\\0.02x=3.7*10^{10}$

Dividing both sides by 0.02

$\frac{0.02x}{0.02}=\frac{3.7*10^{10}}{0.02}\\\\x=1.85*10^{12}$

Number of not burned cells = Total - burned

Number of not burned cells = $1.85*10^{12}-3.7*10^{10}$

Number of not burned cells = $1.813*10^{12}$

$1.813*10^{12}$ cells of Jennies skin were not burned.

Keywords: percentage, division

Learn more about division at:

#LearnwithBrainly

5 0

4 years ago

Read 2 more answers

An administrator at UF wants to estimate the proportion of students who would support an increase in the student activity fee. T

Natalija [7]

Answer:

The correct answer is "664".

Step-by-step explanation:

The given values are:

Margin of error,

E = 5%

i.e.,

= 0.05

Level of confidence,

C = 99%

i.e.,

= 0.99

Level of significance,

α = 0.01

From the z value table,

Critical z = 2.576

As we know,

The required sample size n will be:

= $(\frac{z}{E} )^2\times p(1-p)$

On substituting the values, we get

= $(\frac{2.576}{0.05} )^2\times 0.5(1-0.5)$

= $(51.52)^2\times 0.25$

= $2,654.31\times 0.25$

= $663.5776$

i.e.,

= $664$

3 0

3 years ago

Plz help I might get a F A marching band has 4 rows of trumpets with 10trumpeters in each row.how many trumpeters are in the mar

solmaris [256]

4(10)
an unknown amount of trumpeters.
the answer is 40.

8 0

3 years ago

Read 2 more answers

50=5x−3−8x−7<br> what is X?

Black_prince [1.1K]

Answer:

x = -20

Step-by-step explanation:

Solve for x:

50 = 5 x - 8 x - 7 - 3

Grouping like terms, 5 x - 8 x - 7 - 3 = (5 x - 8 x) + (-3 - 7):

50 = (5 x - 8 x) + (-3 - 7)

5 x - 8 x = -3 x:

50 = -3 x + (-3 - 7)

-3 - 7 = -10:

50 = -10 - 3 x

50 = -3 x - 10 is equivalent to -3 x - 10 = 50:

-3 x - 10 = 50

Add 10 to both sides:

(10 - 10) - 3 x = 10 + 50

10 - 10 = 0:

-3 x = 50 + 10

50 + 10 = 60:

-3 x = 60

Divide both sides of -3 x = 60 by -3:

(-3 x)/(-3) = 60/(-3)

(-3)/(-3) = 1:

x = 60/(-3)

The gcd of 60 and -3 is 3, so 60/(-3) = (3×20)/(3 (-1)) = 3/3×20/(-1) = 20/(-1):

x = 20/(-1)

Multiply numerator and denominator of 20/(-1) by -1:

Answer: x = -20

4 0

3 years ago

Read 2 more answers

Sassy Jeans are $190 a pair. If they are 30% off today, how much will they cost?

Yuliya22 [10]

Answer:

They are 133$

Plz make me Brianliest

Have a nice day

Step-by-step explanation:

'Percentage' is obtained by multiplying 190 by 30%

30% of 190 is equivalent to multiplying them:

30% × 190 = ?

30% × 190 =

(30 ÷ 100) × 190 =

(30 × 190) ÷ 100 =

5,700 ÷ 100 =

7 0

3 years ago