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3 years ago

Factorise 3(x-y)^2 - 2(x-y)

Mathematics

2 answers:

a_sh-v [17]3 years ago

8 0

Answer:

4xy

Step-by-step explanation:

Anna11 [10]3 years ago

4 0

Answer:

$(x - y) [3(x - y) - 2]$

Step-by-step explanation:

$3(x - y)^{2} - 2(x - y)$

Lets take $(x - y)$ common from the expression.

$=> (x - y) [3(x - y) - 2]$

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The Movie House gives away a $5 coupon for every 4 movies purchased.How many movies would you have to purchase in all before rec

Daniel [21]

Answer:

5 movies because for 4 movies equals a coupon

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3 years ago

One of the legs of a right triangle measures 9 cm and the other leg measures 11 cm.

ikadub [295]

Answer:

$\boxed {\boxed {\sf 14.2 \ cm}}$

Step-by-step explanation:

Since this is a right triangle, we can use the Pythagorean Theorem to solve for the sides.

$a^2+b^2=c^2$

where a and b are the legs and c is the hypotenuse. In this triangle, we know the legs are 9 centimeters and 11 centimeters, or:

a= 9 cm
b= 11 cm

Substitute these values into the formula.

$(9 \ cm)^{2} +(11 \ cm)^{2} =c^{2}$

Solve the exponents.

(9 cm)²= 9 cm*9 cm=81 cm²

$81 \ cm^{2} +(11 \ cm)^{2} =c^{2}$

(11 cm)²= 11 cm*11 cm= 121 cm²

$81 \ cm^{2} +121 cm^{2} =c^{2}$

Add the values on the left side.

$202 \ cm^{2} =c^{2}$

Since we are solving for c, we must isolate the variable. It is being squared and the inverse of a square is the square root. Take the square root of both sides.

$\sqrt {202 \ cm^{2} }=\sqrt{c^{2} }$

$\sqrt {202 \ cm^{2} }=c$

$14.2126704036 \ cm =c$

We are told to round to the nearest tenth.

14.2126704036

The 1 in the hundredth place tells us to leave the 2 in the tenth place.

$14.2 \ cm= c$

The hypotenuse is equal to 14.2 centimeters.

3 0

3 years ago

Can someone help me on this question

horrorfan [7]

Answer:

I can help but the grade?

8 0

3 years ago

The football team has 30 more members than the basketball teams. If each group had 10 more members, the ratio of their membershi

Zanzabum

Let x be the number of members on the football team. Let y be the number of members on the basketball team. equation 1: y = x - 30 equation 2: (x + 10) / (y + 10) = 3 / 2 2 * (x+10) = 3 * (y+10) Let's replace y with x - 30. 2 * (x+10) = 3 * (x - 30 + 10) 2x + 20 = 3x - 60 x = 80 y = x - 30 = 80 - 30 = 50 The football team has 80 members. The basketball team has 50 members.

3 0

3 years ago

Find the volume of the cone and the curved surface area of the cone

OlgaM077 [116]

Answer:

301.6, 188.5

Step-by-step explanation:

to find the volume of the cone is πr $^{2} \frac{h}{3}$