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3 years ago

Write an equation to show the best way to estimate 208 ÷ 7 using compatible numbers

Mathematics

1 answer:

Korvikt [17]3 years ago

5 0

Answer:

210 ÷7 = 30

Step-by-step explanation:

We can round the numbers to numbers that make the math easier

I will round 208 to 210

We know 21 divide by 7 is 3

210 ÷7 = 30

This is very close to the actual answer.

208÷7 = 29.71428571........

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Write the number in standard notation.<br><br> 9 x 10^4

bonufazy [111]

10^4 = 10,000

9 x 10,000 = 90,000

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2 years ago

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Every hour of training raises the salary $

Nadya [2.5K]

Answer:

20 dollars

Step-by-step explanation:

Difference in salary between any two hours with a 10 hour gap is 200 dollars

so for on hour it is 20$

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2 years ago

Un profesor realiza una prueba con 70 preguntas, cada una con igual valor. Un

Valentin [98]

Tenemos un problema sobre porcentajes. Veremos que la calificación del alumno es un 80%.

En este caso sabemos que la prueba tiene 70 preguntas, por lo que la cantidad de referencia (el 100%) será 70.

Y sabemos que el estudiante responde correctamente 56 preguntas.

Lo que queremos hacer es ver que porcentaje representa este segundo número.

Para ver esto planteamos dos ecuaciones:

56 = x

70 = 100%

Para resolver esto, debemos ver el cociente entre esas ecuaciones:

56/70 = x/100%

Ahora resolvemos para x:

(56/70)*100% = x = 80%

Es decir, el alumno obtiene una clasificación del 80%.

Si quieres aprender más puedes leer:

brainly.com/question/18546712

3 0

2 years ago

The length of a rectangle is 3 more than its width. The perimeter of the rectangle is 58 cm. What are the rectangle’s dimensions

Alexeev081 [22]

Width = 13cm

Length = 16cm

<u>Explanation:</u>

Let width = b,

So, length = b+3

Perimeter of rectangle = 2x(length + width)

According to the question,

$58cm = 2X(b+3 + b)\\58cm = 2X(2b+3)\\29cm = 2b+3\\ 26cm = 2b\\b = 13cm$

Hence,

Width = 13cm

Length = 16cm

5 0

3 years ago

The temperature was recorded for four straight days.The temperatures was recorded for the first three days were -2°,10°,and 7°.W

lubasha [3.4K]

Answer:

$-19^{\circ}$

Step-by-step explanation:

Let x represent temperature on 4th day.

We have been given that the temperatures was recorded for the first three days were -2°,10°,and 7°.

The total temperature on f days would be $-2^{\circ}+10^{\circ}+7^{\circ}+x$ .

We have been given that total temperature change was -4°. We can represent this information in an equation as:

$-2^{\circ}+10^{\circ}+7^{\circ}+x=-4^{\circ}$

$15^{\circ}+x=-4^{\circ}$

$x=-4^{\circ}-15^{\circ}$

$x=-19^{\circ}$

Therefore, the temperature on 4th day must be equal to $-19^{\circ}$ .

7 0

3 years ago