MATHEMATICS MIDDLE SCHOOL

What is x2+2x-8=0 by factoring ?

Answers

Answer 1

Answer:

Answer:

(x+4)(x-2)

Step-by-step explanation:

We need to find two numbers that multiply to -8 and add up to 2. These are 4,-2.

Rewrite the polynomial:

x^2-2x+4x-8

and factor each pair:

x(x-2)+4(x-2) = (x+4)(x-2)

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Can anyone please help me with theseEvaluate the following expression
4(×+2)=
3 (a+2)=
2 (×+3)=

Answers

Answer:

4(x+2) = 4*x + 4*2 = 4x+8

3(a+2) = 3*a + 3*2 = 3a + 6

2(x+3) = 2*x + 2*3 = 2x +6

Hope this help you :3

Step-by-step explanation:

Use the distributive property a(b + c) = ab + ac

4(x + 2) = (4)(x) + (4)(2) = 4x + 8

3(a + 2) = (3)(a) + (3)(2) = 3a + 6

2(x + 3) = (2)(x) + (2)(3) = 2x + 6

For ΔABC, the measure in degrees of angles A, B, and C are 60, 55, and x + 20 respectively. What is the value of x?

Answers

Answer:

Step-by-step explanation:

All sides of a triangle equel 180 degrees, so 180-60-55=115. 180-115 is 65. 65-20-45. Hope this works!

Ok x = 45 because 180-60-55-20 = 45

I need help finding the values

Answers

Answer:

The answer in the procedure

Step-by-step explanation:

Let

x------> the number of minutes

y------> the depth in feet

In this problem the relationship between the variables, x, and y, represent a proportional variation

Remember that

A proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

step 1

Find the value of k

Let

$A(2,3)$ ------> see the given table

$k=y/x$ ----> substitute the values

$k=3/2=1.5$

The direct variation equation is equal to

$y=1.5x$

step 2

Complete the table

For $x=3\ min$

substitute the value of x in the equation and solve for y

$y=1.5(3)=4.5\ ft$

step 3

Complete the table

For $y=6\ ft$

substitute the value of y in the equation and solve for x

$6=1.5x$

$x=6/1.5=4\ min$

At the local dairy farm, Kareem buys a 32-oz container of yogurt for $2.56. Jonah buys a 6-oz container of yogurt for $0.48. Are the cost, y, in dollars and the amount of yogurt, x, Proportional. Explain.

Answers

Answer:

The cost in dollars and the amount of yogurt are proportional

Step-by-step explanation:

Proportions

Two variables are proportional if the ratio or division between them is a constant value.

Kareem buys a 32-oz container of yogurt for $2.56. We can compute the ratio of the quantity of yogurt and price 32/2.56 and we get 12.5. Jonah buys a 6-oz container of yogurt for $0.48. The relation is now 6/0.48=12.5

Since both ratios are equal, we can say the amount of yogurt, and the cost in dollars are proportional variables

Circle equal groups to finds the equivalent fraction. 6/6=/3