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3 years ago

Use the commutative property to rewrite the following expression. -16 · y

1 answer:

7 0

Commutative property of multiplication is just mixing up the order but the answer stays the same.
Examples: 4 + 5 + 6 = 6 + 4 + 5 ; (a)(d) = (d)(a) ;

Answer:
(-16)(y) or/and (y)(-16)

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Find the area of the circle. Round your answer to two decimal places, if necessary.

nirvana33 [79]

Answer:

379.94 in.²

Step-by-step explanation:

To find the area of a circle, multiply the radius by itself twice, then multiply the product by pi.

$a=\pi r^2$

In the image, the diameter is shown.

To find the radius of a circle, divide the diameter by 2.

$22/2=11$

The radius of this circle is 11 inches.

Next, multiply the radius by itself twice.

$11*11=121$

Lastly, multiply the product by pi (3.14).

$121*3.14=379.94$

Therefore, the area of this circle is 379.94 inches squared.

3 0

3 years ago

Dada una distribución t de Student con 15 grados de libertad, calcule el valor de t1 tal que a) el área a la derecha de t1 sea 0

nikitadnepr [17]

Answer:

a) t₁ = 2,947

b) t₁ = 2,131

c) t₁ = 1,753

d) t₁ = 2,947 -t₁ = -2,947

e) t₁ = 2,131 -t₁ = -2, 131

Step-by-step explanation:

a) t₁ para el área a la derecha de 0,01

En la tabla t- student el t correspondiente a 0,01 es:

t₁ = 2,947

b) t₁ para el área a la izquierda sea de 0,95. Es igual al t para el cual el área de la drecha es 0,05

t₁ = 2,131

c) t₁ para que el área de la derecha sea 0,10

t₁ = 1,753

d) Buscar t₁ para el cual las áreas de derecha de (t₁) más la de la izquierda de (- t₁ ) sea 0,01.

Si el área es de 0,01 quere decir que la mitad, es decir 0,005 es el área para una cola, luego

t₁ = 2,947 y -t₁ = -2,947

e) Para que el área entre - t₁ y t₁ sea 0,95

t₁ = 2,131 y -t₁ = -2, 131

6 0

3 years ago

Evaluate.<br>(5 • 8 – 12)(36 ÷ 9 • 4)

Olenka [21]

(5 x 8 - 12)(36 : 9 x 4)
= (40 - 12)(4 x 4)
= 28 x 16
= 448

6 0

3 years ago

ILL MARK BRAINLIEST IF U ANSWER CORRECT.

nasty-shy [4]

Answer:

so the labelled angles are 30 and 90, but it only shows one 90. In fact there are 4 angles of 90. The marked 90 then the vertical angle and the complementary angles. All triangles equal 180 so the given 30 and 90 are taken from the 180.

180 -30-90= 60

But y is the opposite of the 30 which makes y=30

so that leaves x = 60

y=30 and x=60

4 0

3 years ago

The number of boys in a club is 10 more than half the number of girls.

Sav [38]

Answer:

40 girls

Step By Step Explanation:

assume boys = y girls = x

y = 1/2x + 10

y = 30

30 = 1/2x + 10

1/2x = 20

x = 20 *2 = 40

girls is 40 boys is 30

6 0

3 years ago