All categories

4 years ago

4. In the exit slip, Brady got everything wrong. He needed to factor

Mathematics

1 answer:

Phoenix [80]4 years ago

8 0

Answer:

(1)The error is in third step.

The correct solution is (x-5)²

(2)The error is in third step.

The correct solution is (4c+3)(4c-c)

Step-by-step explanation:

(a-b) whole square is the sum square of a and b and subtraction of product of 2,a and b.

(a-b) = a²+b²-2ab

Therefore,

x²-10x+25

=x²-2.x.5+5²

=(x-5)²

The error is in third step.

The correct solution is (x-5)²

The subtraction of square of b from square a is the product of sum of a and b and the subtraction a from b.

(a²-b²)=(a+b)(a-b)

16c²-9

=(4c)²-3²

=(4c+3)(4c-c)

The error is in third step.

The correct solution is (4c+3)(4c-c)

You might be interested in

Calcula el ancho de un terreno rectangular si el largo mide 20 metros y la superficie es de 280 metros cuadrados

Anna35 [415]

Answer:14 m

Step-by-step explanation:

Dada

larga $l=20\ m$

superficie $A=280\ m^2$

Suponga que el ancho es w

La superficie está dada por el producto de la longitud y la anchura.

$\therefore A=lw\\\Rightarrow 280=20\times w\\\Rightarrow w=14\ m$

Por lo tanto, el ancho es de 14 m.

4 0

3 years ago

A trapezoid is broken into 2 triangles and 1 rectangle. The triangles both have a base of 2 meters and a height of 5 meters. The

Lemur [1.5K]

Answer:

Part 1) The trapezoid has an area of $20\ m^2$

Part 2) The kite has an area of $21\ m^2$

Part 3) The area of the trapezoid is less than the area of the kite

Step-by-step explanation:

Part 1

Find the area of trapezoid

we know that

The area of trapezoid is equal to the area of two congruent triangles plus the area of a rectangle

$A=2[\frac{1}{2} (2)(5)]+(2)(5)$

$A=10+10=20\ m^2$

Part 2

Find the area of the kite

we know that

The area of the kite is equal to the area of two congruent triangles

$A=2[\frac{1}{2} (7)(3)]=21\ m^2$

Part 3

Compare the areas

The trapezoid has an area of $20\ m^2$

The kite has an area of $21\ m^2$

$20\ m^2< 21\ m^2$

therefore

The area of the trapezoid is less than the area of the kite

5 0

4 years ago

Read 2 more answers

9. Which product is greater? (-9) (-3) or (-7) • (-2)? Explain.

lisabon 2012 [21]

Answer:

-(9)(-3) is the greater product

5 0

4 years ago

Read 2 more answers

A bag has 6 red marbles, 8 blue marbles and 4 yellow marbles. What is the probability of picking a red marble, replacing it, and

erastova [34]

4/27

the thing says i need to write twenty characters

6 0

3 years ago

PLEASE HELP NEED ANSWER NOW!!!!<br>Which of these graphs resembles this function? y=x^2

Marizza181 [45]

It would be A. The graph curves upward <span />

6 0

3 years ago

Read 2 more answers