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3 years ago

5

Xios teacher asked him to rewrite the sum of 60+90 as the product of the GCF of the 2 numbers and a sum. Ciao wrote 3(20+30). Wh

at mistake did Xiao make?

1 answer:

Alex_Xolod [135]3 years ago

7 0

3 is not the GCF, 30 is the GCF. The answer is 30(2+3).

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A social work researcher has decided to do a study of people who have adopted children from outside the United States. He asks a

garri49 [273]

Answer:

The correct option is 1

Step-by-step explanation:

Snowball sampling is a typr of sampling technique which is used in investigating hard to reach groups. Existing subjects are asked to nominate further suubjects known to them, thereby making the sample increase like a rolling snowball

6 0

4 years ago

In △XYZ , XZ=9 , YZ=4 , and XY=7 .

Mamont248 [21]

Answer:

$A=6\sqrt{5}\ units^2$

Step-by-step explanation:

we know that

Heron's Formula is a method for calculating the area of a triangle when you know the lengths of all three sides.

so

$A=\sqrt{s(s-a)(s-b)(s-c)}$

where

a, b and c are the length sides of triangle

s is the semi-perimeter of triangle

we have

$a=9\ units,b=4\ units,c=7\ units$

Find the semi-perimeter s

$s=\frac{9+4+7}{2}=10\ units$

Find the area of triangle

$A=\sqrt{10(10-9)(10-4)(10-7)}$

$A=\sqrt{10(1)(6)(3)}$

$A=\sqrt{180}\ units^2$

Simplify

$A=6\sqrt{5}\ units^2$

8 0

3 years ago

A library expansion, begun in 2002, was expected to cost $103 million. By 2006, library officials estimate the cost would be $39

Rainbow [258]

initial estimate in 2002 = 103M

Actual cost in 2006 = 142M (103M + 39M)

% over budget = 39/103 = 37.86%

6 0

4 years ago

Sally hopes to buy a 10 - kayak for $15,000. Describe all the numbers that when round to the nearest hundred are 15,000

Masteriza [31]

Answer:

All the numbers ranging from 14,500 to 15444 would be rounded to 15000

Step-by-step explanation:

All the numbers ranging from 14,500 to 15444 would be rounded to 15000.

How this is possible.

1) all the numbers from 0-4 are not counted as the next number when rounded off.

2) all the numbers from 5-9 are counted as the next number when rounded off.

Example Suppose we have numbers from 15- 19.

These numbers can be rounded off to 20

But numbers from 10-14 would never be rounded off to 20 instead they are rounded as 10.

Same happens in the hundreds case.

If we have numbers from 450 - 499 they can be rounded as 500

And numbers from 400 - 444 cannot be rounded as 500 but the number 445 may be rounded as 450 . When we carry 5 from units place and replace it as 450 then again 450 can be rounded to 500.

Same happens with 15000 but when are rounding nearest hundred not ten.

Thus all the numbers ranging from 14,500 to 15444 would be rounded to 15000.

7 0

3 years ago

In the figure below, BD and EC are diameters of circle P. What is the arc measure of AE in degrees?

Snowcat [4.5K]

Answer:

27°

Step-by-step explanation:

Since BD is a diameter then arc BD = 180°

∠ APE = 180° - (90 + 63)° = 180° - 153° = 27°

The measure of the arc AE is equal to the angle at the centre subtended by it.

arc AE = ∠ APE = 27°

4 0

3 years ago