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nataly862011 [7]
3 years ago
13

Find the area of each figure to the nearest tenth.

Mathematics
1 answer:
sergey [27]3 years ago
6 0

Answer:

Area of triangle ABC=7 square units

Area of triangle A'B'C'=7 square units

Step-by-step explanation:

Triangle ABC is the preimage of triangle A'B'C' under a reflection in the line x=0.

The two triangles are congruent so they have the same area.

We can calculate the area by counting the unit squares the triangle covered.

Each full box is 1 units square.

Each triangle covered

1 full box and 12 partially covered boxes.

Each partial box covered is 0.5 square units.

Therefore the area is

Area=1+0.5\times12

Area=1+6

Area=7 square units

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In a certain class of​ students, there are 11 boys from​ Wilmette, 7 girls from​ Wilmette, 5 boys from​ Winnetka, 4 girls from​
attashe74 [19]

Answer:

.571

Step-by-step explanation:

We need to find the total number of boys

11+5+4 = 20

And the total number of students

11+7+5+4+4+4 = 35

The Probability that the student is a boy is boy/total

P (boy) = boy/total

           = 20/35

           =4/7

            =.571428571

  to 3 decimal places

           =.571

6 0
2 years ago
Find the length of side x in simplest radical form with a rational denominator.
NeTakaya

Answer:

x = 2 \sqrt{5}

Step-by-step explanation:

\sin \: 30 \degree =  \frac{ \sqrt{5} }{x}  \\  \\  \frac{1}{2} =  \frac{ \sqrt{5} }{x}  \\  \\x = 2 \sqrt{5}

5 0
2 years ago
Find the equation of a line that passes through the point (3,5) and has a gradient of 2.
Karolina [17]

Answer:

y = 2x - 1

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = 2 , then

y = 2x + c ← is the partial equation

To find c substitute (3, 5) into the partial equation

5 = 6 + c ⇒ c = 5 - 6 = - 1

y = 2x - 1 ← equation of line

7 0
2 years ago
Please do these problems, and show work:
masha68 [24]
Here’s the first one

6 0
2 years ago
Which function has a domain where x does not =3 and a range where y does not =2? A. f(x)=(x-5)/(x+3) B. f(x)=2(x+5)/(x+3) C. 2(x
Natali5045456 [20]

Answer: D. (x+5)/(x-3)

Step-by-step explanation:

Domain = Set of all input values of a function.

range = set of all output values of a function.

Given: Domain: x\neq3   ; range = y\neq2

We do not include a value for domain if it makes the expression indeterminant .

Since all the functions in options are fractions, here the denominator does not equal to 0.

But in option C and D, the denominator can be zero if x=3.

So , domain for then it x\in {R-3}

Also, for option C if 2=2\dfrac{(x+5)}{(x-3)}

\Rightarrow\ x-3=x+5\\\\\Rightarrow\ -3=5.which is not true.

Wher as in option D, 2=\dfrac{x+5}{x-3}\Rightarrow\ 2x-6=x+5\Rightarrow\ x=11

Hence, Domain: x\neq3   ; range = y\neq2 is for option D.

3 0
3 years ago
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