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Alona [7]
3 years ago
12

Help please! I have choral practice...

Mathematics
2 answers:
Maslowich3 years ago
7 0
<span>This polygon is composed of a right triangle and <span>a parallelogram.

The area of right angle :
A_\Delta=\frac{1}{2}\cdot15\cdot8=\frac{1}{2}\cdot120=\boxed{60\ (cm^2)}

The area of the </span></span><span>parallelogram</span>:
A_P=15\cdot(13-8)=15\cdot5=\boxed{75\ (cm^2)}

The area of the polygon is equal:A=A_\Delta+A_P

Therefore, the answer is:
\boxed{\boxed{A=60\ cm^2+75\ cm^2=135\ cm^2}}
zalisa [80]3 years ago
7 0

Slice the picture in half, across the middle dotted line.

The top half is a triangle.  Its base is 15cm and its height is 8cm .
Area of a triangle is (1/2) (base x height) = (1/2) (120cm²) = 60 cm².

The bottom half is a parallelogram.  Its base is 15cm and its height is 5cm.
Area of a parallelogram is (base x height) = (15cm x 5cm) = 75 cm².

Add the two pieces together.  (60cm²) + (75 cm²) = <em>135 cm²

</em>
Breathe from the diaphragm, enunciate, and watch the conductor.<em>


</em>
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Student Produced Response - Calculator
faltersainse [42]

Answer:

\dfrac{a}{b}=0.75.

Step-by-step explanation:

If two equations a_1x+b_1y+c_1=0 and a_2x+b_2y+c_2=0 has infinitely many solutions, then

\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}=\dfrac{c_1}{c_2}

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It is given that the above system of equations has infinitely many solutions. So,

\dfrac{a}{3}=\dfrac{b}{4}=\dfrac{10}{20}

\dfrac{a}{3}=\dfrac{b}{4}=\dfrac{1}{2}

Now,

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a=\dfrac{3}{2} and b=\dfrac{4}{2}

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So, a=1.5 and b=2.

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\dfrac{a}{b}=\dfrac{1.5}{2}=0.75

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3 years ago
1. (3x + 7) + (8x + 2)
Mashutka [201]
11x+9


Step by step:
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3 years ago
The equation 4(x – 3)2 – 5 = 139 has two solutions: one positive and one negative. What is the
AlekseyPX

Answer:

Step-by-step explanation:

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