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Sedbober [7]
3 years ago
9

Which expression is equivalent to:

Mathematics
1 answer:
Paul [167]3 years ago
4 0

B.) 10x-5 is equivalent to 6x – 5 + x + 3x

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Please please help me please
Butoxors [25]

Answer:

Step-by-step explanation:

height of a triangle=4x-1

base=5x+2x-3

=7x-2

area of triangle=base*height/2

=(7x-2)(2x-3)/2

=7x*2x-7x*3-2*2x+2*3/2

=14x^2+21x-4x-6/2

=14^2+17x-6/2

area of rectangle=l*b

(7x-2)(4x+1)

7x(4x+1)-2(4x+1)

4x*7x+7x*1-2*4x-2*1

=28x^2+7x-8x-2

=28x^2-x-2

area of shaded part=area of rectangle-area of triangle

=(28x^2-x-2 )-\frac{14x^2+17x-6}{2}

7 0
3 years ago
5. Two similar figures have volumes 27 in.? and 125 in.?. The surface area of the smaller figure is 63 in.. (1 point)
GREYUIT [131]

Answer:

175\ in^{2}

Step-by-step explanation:

step 1

Find the scale factor

we know that

If two figures are similar, then the ratio of its volumes is equal to the scale factor elevated to the cube

Let

z----> the scale factor

x----> volume of the larger solid

y----> volume of the smaller solid

z^{3}=\frac{x}{y}

we have

x=125\ in^{3}

y=27\ in^{3}

substitute

z^{3}=\frac{125}{27}

z=\frac{5}{3}

step 2

Find the surface area of the larger solid

we know that

If two figures are similar, then the ratio of its surface areas is equal to the scale factor squared

Let

z----> the scale factor

x----> surface area of the larger solid

y----> surface area of the smaller solid

z^{2}=\frac{x}{y}

we have

z=\frac{5}{3}

y=63\ in^{2}

substitute

(\frac{5}{3})^{2}=\frac{x}{63}

x=\frac{25}{9}*63=175\ in^{2}

3 0
3 years ago
According to the “guns or butter” example, if a country decides to spend more on military goods, which of the following will hap
Lisa [10]
The answer would be A. the country will have less money to devote to consumer goods, obviously since it is investing the money in military :p the other answer choices hardly make sense
7 0
3 years ago
Read 2 more answers
Fifty percent of students in your school own a bike. Of a sample of students in your school, the ratio of students who own a bik
Svetradugi [14.3K]

Answer:

Yes

Step-by-step explanation:

If 4 is half of 8, and 50% is half of 100%, then 4:8 is an accurate ratio depecting that half the school owns a bike.

8 0
3 years ago
Read 2 more answers
Any answers?? 25 points
prohojiy [21]

Answer:

29

Step-by-step explanation:

c² = 2² + 5²

c² = 4 + 25

c² = 29

c = sqrt(29)

7 0
3 years ago
Read 2 more answers
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