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3 years ago

Can you explain how to solve this please?

Mathematics

1 answer:

givi [52]3 years ago

6 0

9514 1404 393

Answer:

-25

Step-by-step explanation:

Consult your memory of multiplication tables to determine the square root of 100.

10×10 = 100

√100 = 10

Then multiply that value by -2.5

-2.5×10 = -25

___

Of course, you can use a calculator or spreadsheet to evaluate this expression, too.

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german

Answer:

16 and 15

Step-by-step explanation:

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

A tree grew 92 4/5 feet in 19 1/3 years. What was the average yearly growth rate of the tree

White raven [17]

Exact Form:
26912/15
Decimal Form:
1794.13
Mixed Number Form:
1794 2/15

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3 years ago

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I know that the balloon weighs about 210 kg. The balloon itself weighs 7/9 out of this. The rest of the weight is composed of sa

Yuliya22 [10]

Answer:

Gas Tanks weighs 20/3kg i.e. 6.67kg while Sacks weighs 40kg

Step-by-step explanation:

Total weight = 210kg

$Balloon Weight = \frac{7}{9} *210\\Balloon Weight = \frac{490}{3}kg$

Balloon Weight = 163.33kg

Remaining Weight = 210 - (490/3)

$=\frac{630-490}{3}$

=46.67kg

Let the weight of Gas tank = g

Let the weight of Sacks = s

This remaining weight comprises of weight of Sacks and Gas Tanks.

i.e.

g+s = 140/3 = 46.67

As given that,

$g=\frac{1}{6}*s$

So,

$s(\frac{1}{6}+1) = \frac{140}{3}$

$s(\frac{7}{6} ) = \frac{140}{7}$

s=40kg

As provided

Now to find g:

g+s = 140/3

$g=\frac{140}{3}-s\\=\frac{140}{3} -40\\=\frac{20}{3}kg\\=6.67kg$

6 0

3 years ago

Find the constant of variation k for the direct variation.<br><br> 2x + 6y = 0

Flauer [41]

Answer:

$k=-\frac{1}{3}$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

In this problem we have

$2x+6y=0$

Isolate the variable y

subtract 2x both sides

$2x+6y-2x=0-2x$

$6y=-2x$

Divide by 6 both sides

$y=-\frac{1}{3}x$

therefore

The constant of variation is equal to

$k=-\frac{1}{3}$

5 0

3 years ago