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Lynna [10]
3 years ago
15

Please help asap!!!!

Mathematics
1 answer:
Leya [2.2K]3 years ago
6 0

Answer:

z = 25

Step-by-step explanation:

adjacent angles in a rhombus are supplementary

3z - 15 + 7z - 55 = 180

10z - 70 = 180

10z = 250

z = 25

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Abcd is a parallelogram. its diagonal, ac, is 18 inches long and forms a 20° angle with the base of the parallelogram. angle abc
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Josue broke a cell sample into 12 batches, each weighing 6.9 x 10 ^-10
Klio2033 [76]

Using proportions, it is found that the original sample weighed 8.28 \times 10^{-9} grams.

  • This question is solved by <em>proportions</em>, using a rule of three.
  • The weight of 1 batch, in grams, is of 6.9 \times 10^{-10}. How much do the sample of 12 batches weigh?

The rule of three is:

1 batch - 6.9 \times 10^{-10} grams.

12 batches - x grams

Applying cross multiplication:

x = 12 \times 6.9 \times 10^{-10} = 82.8 \times 10^{-10}

Applying scientific notation:

8.28 \times 10^{-9}

The original sample weighed 8.28 \times 10^{-9} grams.

You can learn more about proportions at brainly.com/question/24372153

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3 years ago
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El piso de un habitación es de forma cuadrada. Tiene 10m de longitud por lado y debe ser cubierto con losetas cuadradas de 25cm
lora16 [44]

Answer:

4 fichas

Step-by-step explanation:

Paso 1

Encontramos el área de la habitación cuadrada.

Área de un cuadrado = longitud del lado²

Longitud lateral = 10 cm

Área del piso cuadrado = (10cm) ²

= 100 cm²

Paso 2

El suelo debe estar cubierto con baldosas cuadradas de 25 cm.

Por lo tanto: El número de mosaicos que serán necesarios =

Área del piso cuadrado ÷ Área de las baldosas

= 100cm² / 25 cuadrados

= 4 fichas

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