All categories

3 years ago

Simplify 2x2 - y for x = 3 and y = -2. 10 16 20 14

Mathematics

2 answers:

RoseWind [281]3 years ago

6 0

Answer:

Step-by-step explanation:

Given

2x² - y ← substitute x = 3 and y = - 2 into the expression

= 2(3)² - (- 2)

= 2(9) + 2

= 18 + 2

= 20

goldfiish [28.3K]3 years ago

6 0

Answer: I hope one of the answers help because the equation inst put correctly so it can be either 14 or 10 check below for the equation order.

Step-by-step explanation:

First, you substitute the input variables for x and y.

$2^3(2)-2 =\\8(2)-2=\\16-2=14\\\\2(3)(2)-2=\\6(2)-2=\\12-2=10$

You might be interested in

Write the trinomial as a square of a binomial<br> x^2+2xy+y^2

vitfil [10]

Answer:

$\large\boxed{x^2+2xy+y^2=(x+y)^2}$

Step-by-step explanation:

$(x+y)^2=(x+y)(x+y)\\\\\text{Use FOIL}\ (a+b)(c+d)=ac+ad+bc+bd\\\\=(x)(x)+(x)(y)+(y)(x)+(y)(y)=x^2+xy+xy+y^2=x^2+2xy+y^2$

3 0

3 years ago

Read 2 more answers

Find the missing value <br> 3/8 +1/?=5/8<br> 3/4-1/?=1/4<br> ?/6 + 1/8= 23/24

steposvetlana [31]

1st one : is 1/4 ( subtract 3/8 from both sides and simplify 5/8 - 3/8 to 1/4. )

2nd one : is 1/2 ( subtract 3/4 from both sides, simplify 1/4 - 3/4 to 1/-2, and then multiply both sides by -1 )

3rd one : is 5/6 ( subtract 1/8 from both sides and simplify 23/24 - 1/8 to 5/6).

6 0

3 years ago

Read 2 more answers

Please I need help of this one :)

Harlamova29_29 [7]

Answer:

128.605 m²

Step-by-step explanation:

Find the areas of the top triangle, and the bottom triangle and add them together.

The top triangle consists of 2 smaller triangles. Look at the larger one, the height is 4.93 and the base is 17. The area is...

A = (1/2)(17)(4.93)

A = 41.905 m²

The bottom triangle consists of 2 smaller triangles. Look at the larger one, the height is 10.2 and the base is 17. The area is...

A = (1/2)(17)(10.2)

A = 86.7 m²

The total area is 41.905 m² + 86.7 m² = 128.605 m²

5 0

3 years ago

using the slope formula find the slope of the line through the points (0,0) and (3,9) use pencil and paper explain how you can u

maxonik [38]

Answer:

9/3

Step-by-step explanation:

you can't subtract from zero or you can't subtract a number from zero.

7 0

3 years ago

Read 2 more answers

Haley makes earrings and packages them into cube boxes that measure 1/6 foot wide. How many 1/6 foot cubic boxes can she fit int

alexandr402 [8]

Answer: 28 cube boxes.

Step-by-step explanation:

The volume of a cube can be found with this formula:

$V_{(c)}=s^3$

Where "s" is the lenght of any edge of the cube.

You need to find the volume of a cube box:

$V_1=s^3=(\frac{1}{6}ft)^3=\frac{1}{216}ft^3$

To find the volume of the shipping box, first we must convert the mixed number to an improper fraction. To do it, multiply the whole number part by the denominator of the fraction and add this product to the numerator.

The denominator does not change.

Then:

$1\ \frac{1}{6}=\frac{(1*6)+1}{6}=\frac{7}{6}$

Knowing the dimensions of the shipping box, you can calculate its volume by multiplying its dimensions. Then, this is:

$V_2=(\frac{7}{6}\ ft)(\frac{1}{3}\ ft)(\frac{1}{3}\ ft)=\frac{7}{54}\ ft^3$

Finally, in order to find the number of cube boxes can Haley fits into a shipping box, you must divide the the volume of the shipping box by the volume of one cube:

$\frac{\frac{7}{54}ft^3}{\frac{1}{216}ft^3}=28$

5 0

3 years ago