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Daniel [21]
3 years ago
7

Factor completely please

Mathematics
1 answer:
Sedbober [7]3 years ago
3 0

Answer:

Step-by-step explanation:

hello :

1-x² = (1-x)(1+x) by identity : a²-b²=(a-b)(a+b)

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Step-by-step explanation:

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The following figure is made of a triangle and a rectangle. All of the sides of the triangle are the same length.
Andru [333]

Answer:

130cm

Step-by-step explanation:

the perimeter of the triangle is 15 the perimeter of the rectangle is 150 + 115 + 15 equals 103 ♥ hope it helped

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What is 21 rounded to the nearest ten?
BARSIC [14]

Answer:

20

Step-by-step explanation:

the two closest are 20 and 30

21 is the next digit after 20 and the closest to it.

21 is 9 away from 30 and is farther.

4 0
3 years ago
2. Find the correlation coefficient AND best fit line, of the following data use the linear model
shtirl [24]

Ans? u9999y

Step-by-step explanation:

Chelsea is making a kite in the shape of a triangle. To determine if the triangle is a right triangle, Chelsea completed the following steps.

Step 1:

Find the side lengths of the triangle: 30 inches, 24 inches, 18 inches.

Step 2:

Substitute the values into the Pythagorean theorem: 18 squared + 24 squared = 30 squared.

Step 3:

Combine like terms: (18 + 24) squared = 30 squared.

Step 4:

Evaluate each side: 1764 not-equals 900.

Chelsea says the triangle is not a right triangle. Which best describes the accuracy of her explanation?

The triangle is actually a right triangle. In step 2, Chelsea incorrectly substituted the values into the Pythagorean theorem.

The triangle is not a right triangle, but in step 2 Chelsea incorrectly substituted the values into the Pythagorean theorem.

The triangle is actually a right triangle. In step 3, Chelsea incorrectly rewrote the expression on the left side of the equation.

The triangle is not a right triangle, but in step 3, Chelsea incorrectly rewrote the expression on the left side of the equation.

7 0
3 years ago
Can someone answer this question answer it correctly please and show work please
3241004551 [841]

Answer:

42) 254.47 ft²

43) 56 pendants

Step-by-step explanation:

42)

The radius of a circle is equal to half of its diameter.

Diameter = 18 feet

Radius = Diameter ÷ 2 = 18 ÷ 2 = 9 feet

Area of a circle = π r^{2}

Substitute in known value of r

Area = π 9^{2}

Substitute in pi

Area = 3.14 * 9^{2}

Solve exponent

Area = 3.14159265359 * 81

Area = 254.4690049408

(Rounds to 254.47)

254.47 ft²

43)

1\frac{1}{2} = 1.5 ounces per pendant

3 pieces of silver:

1\frac{7}{8}  pounds

14 ounces

2\frac{1}{2} pounds

Convert to improper fractions (1 lb = 16 ounces)

\frac{15}{8}  pounds

\frac{14}{16}  pounds

\frac{5}{2} pounds

Find a common denominator for the fractions

\frac{30}{16} pounds

\frac{14}{16} pounds

\frac{40}{16} pounds

Add

\frac{30}{16} + \frac{14}{16}  + \frac{40}{16}  

\frac{84}{16}  pounds

Find how many pendants can be made out of this amount

\frac{84}{16}  pounds

Convert back to ounces (1 lb = 16 ounces)

84 ounces

Amount to make one pendant:

1\frac{1}{2} ounces

Convert to decimal

1.5 ounces

Divide 84 by amount of silver per pendant

84 ÷ 1.5

56

The maximum number the pendants that the manufacturer can make is 56

Hope this helps :)

8 0
3 years ago
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