3 years ago

Write 127.90 in expanded form

Mathematics

1 answer:

yan [13]3 years ago

3 0

127.90 in expanded form:

100 + 20 + 7 + 0.9

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Is my answer right? the other options are A.0.33 B.0.42 C.0.58 D.0.67

Fittoniya [83]

Yes 0.42 is correct!!

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3 years ago

Write two expressions that show that decreasing a quantity by 10% is the same as multiplying that quantity by 0.9

Contact [7]

Step-by-step explanation:

x -0.1x = x(1-0.1) = 0.9x

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3 years ago

The vertices of a square are A(–2, 4), B(4, 4), C(4, –2), and D(–2, –2). The diagonals of the square intersect at their midpoint

sertanlavr [38]

A(–2, 4), B(4, 4), C(4, –2), D(–2, –2)
-> select some diagonal: AC
midpoint is at A+(1/2)*AC

-> calculate vector AC:
AC=(4-(-2),-2-4)=(6,-6)
-> calculate half length of AC:
(1/2)*AC=(3,-3)

A+(1/2)*AC=
(-2,4)+(3,-3)=(1,1) which is the midpoint

so the first option is correct

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3 years ago

Multiplicative inverse of 0.65

gavmur [86]

1.5385 I hope this helps

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3 years ago

I always get these wrong

Ilya [14]

Hi there! Answer: r = 9 feet

We can find the area of a circle by using the following formula:

Area = pi × radius^2
A = pi × r^2
$a = \pi {r}^{2}$

In this particular question, we have the following data:

The area (A) is 254.34 square feet.
$a = 254 . 34$

Pi equals 3.14
$\pi = 3.14$

Now let's fill in the given formula.
$254.34 = 3.14 \times r {}^{2}$

Divide both sides by pi (in other words: divide by 3.14).
${r}^{2} = 81$

Now take the square root of both sides of the equation. We only need to find the positive solution of this equation, because a radius cannot be negative.
$r = \sqrt{81} = 9$

Therefore, the radius is 9 feet.
~ Hope this helps you!

6 0

3 years ago

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