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3 years ago

5x70= 5 x_tens = tens =____? Use place value to find the product.

Mathematics

2 answers:

zhuklara [117]3 years ago

5 0

5 × 70 = 5 × 7 tens = 350

WHY?

1 ten = 10 ones

70 ÷ 10 = 7

So 7 tens.

Hope I helped ya!

artcher [175]3 years ago

5 0

Solution:

5 x 70 = 5 x  7  tens

At the blank space 7.

Because 1 ten = 1 x 10

Therefore, 70 = 7 tens

70 as 7 tens

5 x 70 = 5 x  7  tens = 35 tens

Because 5 x 7 =35

As we know 35 tens = 350

Because 1 tens = 10

Therefore, 35 tens = 350

Thus, 5x70 = 350

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Let $x_1, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_{10}, x_{11}$ be the weight of i-th player.

1. If the mean weight of 4 backfield members on the football team is 221 lb, then

$\dfrac{x_1+x_2+x_3+x_4}{4}=221\ lb.$

2. If the mean weight of the 7 other players is 202 lb, then

$\dfrac{x_5+x_6+x_7+x_8+x_9+x_{10}+x_{11}}{7}=202\ lb.$

3. From the previous statements you have that

$x_1+x_2+x_3+x_4=221\cdot 4=884 \lb,\\ \\x_5+x_6+x_7+x_8+x_9+x_{10}+x_{11}=202\cdot 7=1414\ lb.$

Add these two equalities and then divide by 11:

$x_1+x_2+x_3+x_4+x_5+x_6+x_7+x_8+x_9+x_{10}+x_{11}=884+1414=2298\ lb,\\ \\\dfrac{x_1+x_2+x_3+x_4+x_5+x_6+x_7+x_8+x_9+x_{10}+x_{11}}{11}=\dfrac{2298}{11}=208\dfrac{10}{11}\ lb.$

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3 years ago

Translate this sentence into an equation. 45 is the sum of 19 and Victor's score

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3 years ago

Area of a circle is 80 cm². Work out the circumference of the circle.

GuDViN [60]

Answer:

The circumference of circle is: 31.714 cm

Step-by-step explanation:

Let C be the circumference of the circle

And A be the area of circle

It is given that:

$A = 80cm^2$

We have to find the radius first so that it can be used to find the circumference

The area of circle is given by the formula:

$A = \pi r^2$

Putting the value of area

$80 = 3.14 * r^2\\\frac{80}{3.14} = r^2\\r^2 = 25.477$

Taking square root on both sides

$\sqrt{r^2} = \sqrt{25.477..}\\r = 5.0475\ cm$

Now

$C = 2\pi r$

Putting the value of radius

$C = 2 * 3.14 * 5.05\\C = 31.714\ cm$

Hence,

The circumference of circle is: 31.714 cm

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3 years ago

5x70= 5 x_____tens = ______tens =______? Use place value to find the product.

5x70= 5 x_tens = tens =____? Use place value to find the product.