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3 years ago

Find the area of the shaded region. use 3.14 for pi. Round to the hundredths if necessary.

Mathematics

1 answer:

ludmilkaskok [199]3 years ago

7 0

Answer:

122.46 cm²

Step-by-step explanation:

A = $\pi r^{2}$

~~~~~~~~~

$r_{1}$ = 8 cm

$r_{2}$ = 5 cm

A = 3.14 ( 8² - 5² ) ≈ 122.46 cm²

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982^2-37^2 evaluate

g100num [7]

Answer:

$962955$

Step-by-step explanation:

$(982 - 37) \times (982 + 37)$

$945 \times 1019$

$962955$

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3 years ago

Suppose Paola uses 18 tablespoons of iced tea mix. How many cups of water does she need to use?

kvasek [131]

Answer:

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3 years ago

A box is shaped like a cube. The box has a length of 1 foot, a width of 1 foot, and aheight of 1 foot. What is the volume of the

andre [41]

Answer:

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Step-by-step explanation:

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7 0

2 years ago

Read 2 more answers

Un boligrafo cuesta 30 ptas mas que un lapiz. Un muchacho ha comprado 8 boligrafos y 15 lapices. En total le han costado 700 pta

Firdavs [7]

Por un sistema de ecuaciones, tiene-se que:

Cada lapiz cuesta 20 ptas.
Cada boligrafo cuesta 50 ptas.

-------------------------

Considera-se un sistema de ecuaciones, con cada boligrafo custando x y cada lapiz custando y.

Boligrafo cuesta 30 mas que un lapiz, o sea, $x = 30 + y$
8 boligrafos y 15 lapices cuesta 700, o sea, $8x + 15y = 700$

-------------------------

Aplicando el primer ecuación en la segunda, tiene-se el cuesto de cada lapiz:

$8x + 15y = 700$

$8(30 + y) + 15y = 700$

$240 + 8y + 15y = 700$

$23y = 460$

$y = \frac{460}{23}$

$y = 20$

Cada lapiz cuesta 20 ptas.

-------------------------

Por fin, el cuesto de cada boligrafo es dado por:

$x = 30 + y = 30 + 20 = 50$

Cada boligrafo cuesta 50 ptas.

Un problema similar es dado en brainly.com/question/24637096

4 0

2 years ago