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3 years ago

Elena has 80 trading cards in her collection. If 15%

1 answer:

3 0

The answer for the first one is 12. 15% of 80 is 12. The second one I can’t answer because it is not very clear and is cut off

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Solve by canceling <br><br> -5x+8y=-4<br> 6x-8y=-12

Vinil7 [7]

Step-by-step explanation:

-5x+8y=-4

6x-8y=-12 8y and 8x cancel out

x=-16

To solve for y, substitute x=-16 back into the first equation

-5(-16)+8y=-4

80+8y=-4

8y=-84

y=-10.5

7 0

2 years ago

Which is a quadrilateral that could have one pair of parallel sides and one pair of sides that are not parallel?

Lapatulllka [165]

Answer:

trapezoid.

Step-by-step explanation:

A trapezoid is a convex quadrilateral. A trapezoid has at least on pair of parallel sides. the parallel sides are called bases while the non parallel sides are called legs

Characteristics of a trapezoid

It has 4 vertices and edges

If both pairs of its opposite sides of a trapezoid are parallel, it becomes a parallelogram

Area of a trapezoid = $\frac{1}{2}$ x (sum of the lengths of the parallel sides) x height

Perimeter = sum of lengths of sides of a trapezoid

8 0

2 years ago

What is the surface area of the triangular prism?

TiliK225 [7]

Answer:

Step-by-step explanation:

surface area = bh + L(s1 + s2 + s3)

where b = 24 ft.

h = 9 ft.

s1 = 15 ft.

s2 = 15 ft.

s3 = 24 ft.

L = 40 ft.

<u>plugin values into the formula:</u>

A = 24*9 + 40(15 + 15 + 24)

= 216 + 40(54)

= 2,376 ft²

7 0

2 years ago

Jayden asked his classmates, "How many days do you exercise in a typical

konstantin123 [22]

Answer:

Step-by-step explanation:

There is 13 dots.

4 0

2 years ago

Find the square. (1/4A + 1/4B)^2<br><br> a) 1/16A^2 + 1/8AB + 1/16B^2<br> b) 1/4A^2 + 1/8AB + 1/4B^2

alisha [4.7K]

$(a + b)^2 = a^2 + 2ab + b^2$

$(\dfrac{1}{4}A + \dfrac{1}{4}B)^2 =$

$= \dfrac{1}{16}A^2 + \dfrac{1}{8}AB + \dfrac{1}{16}B^2$

Answer: A.

Another way to solve by factoring 1/4.

$(\dfrac{1}{4}A + \dfrac{1}{4}B)^2 =$

$= [\dfrac{1}{4}(A + B)]^2$

$= (\dfrac{1}{4})^2(A + B)^2$

$= \dfrac{1}{16}(A^2 + 2AB + B^2)$

$= \dfrac{1}{16}A^2 + \dfrac{1}{16}2AB + \dfrac{1}{16}B)^2$

$= \dfrac{1}{16}A^2 + \dfrac{1}{8}AB + \dfrac{1}{16}B)^2$

6 0

3 years ago

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