All categories

4 years ago

One of Marianna's homework problems was to solve the equation below.

Mathematics

1 answer:

Strike441 [17]4 years ago

3 0

Answer:

<h2>Marianna is incorrect because x2</h2><h2>2x13 can be factored into two binomials</h2>

Step-by-step explanation:

ax^2+bx+c = 0

x=−1+√14 or x=−1−√14

discriminant=56

completing square x=−1+√14 or x=−1−√14

Now, we can solve each term for

x=-2 she is incorrect

x(x+2)=0

Now, we can solve each term for

x=0

- no other work needed,

and

x+2=0

x+2-2=0-2

x+0=-2

x=-2

<h3>Brainliest please!</h3>

You might be interested in

2. Match the shapes given to their correct areas.

aliina [53]

Applying the formula for each identified shape that are given, the correct areas to each shape are:

a. Square = 134.6 sq. yd

b. Circle = 452.2 sq. cm

c. Parallelogram = 40.6 sq. cm

d. Rectangle = 43.2 sq. ft

e. Trapezium = 25.7 sq. m

f. Triangle = 21.6 sq. ft

a. The shape given is a square.

Area of the square = $s^2$

Where,

s = 11.6 yd

Plug in the value of s

Area of the square = $11.6^2 = 134.6 $ yd^2$

b. The shape given is a circle.

Area of the circle = $\pi r^2$

Where,

r = 12 cm

Plug in the value of r

Area of the square = $\pi \times 12^2 = 452.2 $ cm^2$

c. The shape given is a parallelogram.

Area of the parallelogram = $bh$

Where,

b = 7 cm

h = 5.8 cm

Plug in the value of b and h

Area of the parallelogram = $7 \times 5.8 = 40.6 $ cm^2$

d. The shape given is a rectangle.

Area of the rectangle = $l \times w$

Where,

l = 8.3 ft

w = 5.2 ft

Plug in the value of l and w

Area of the rectangle = $8.3 \times 5.2 = 43.2 $ ft^2$

e. The shape given is a trapezium.

Area of the trapezium = $\frac{1}{2} (a + b) \times h$

Where,

a = 2.8 m

b = 10.4 m

h = 3.9 m

Plug in the value of a, b, and h

Area of the trapezium = $\frac{1}{2}(2.8 + 10.4) \times 3.9 = 25.7 $ m^2$

f. The shape given is a triangle. (See attachment for the shape).

Area of the triangle = $\frac{1}{2} \times b \times h$

Where,

b = 9 ft

h = 4.8 ft

Plug in the value of b, and h

Area of the triangle = $\frac{1}{2} \times 9 \times 4.8 = 21.6 $ ft^2$

Therefore, applying the formula for each identified shape that are given, the correct areas to each shape are:

a. Square = 134.6 sq. yd

b. Circle = 452.2 sq. cm

c. Parallelogram = 40.6 sq. cm

d. Rectangle = 43.2 sq. ft

e. Trapezium = 25.7 sq. m

f. Triangle = 21.6 sq. ft

Learn more here:

brainly.com/question/22560863

5 0

3 years ago

5w+10=40

Ratling [72]

Answer:

Step-by-step explanation:

5w+10=40

5w=40-10

5w=30

w=30/5

w=6

Answer: A) 6

-------------------

10k+5=65

10k=65-5

10k=60

k=60/10

k=6

Answer: k=6

-------------------

2b-15=33

2b=33+15

2b=48

b=48/2

b=24

Answer: b=24

-----------------------

3d+18=21

3d=21-18

3d=3

d=3/3

d=1

Answer: d=1

6 0

3 years ago

Colin puts a layer of cheese on a pizza with an area of 113 square inches in 1/9 of an hour. What is the speed, in square inches

il63 [147K]

Since Colin can cover a 113 square inch pizza in 1/9 of an hour, he can cover 9 pizzas in an hour. 113 * 9 = 1017 square inches an hour.

5 0

4 years ago

Order the following values from least to greatest. 2/7, 3/5, 6/13, 5/9

qwelly [4]

Answer:

2/7 < 6/13 < 5/9 < 3/5 or 2/7, 6/13, 5/9, 3/5

Step-by-step explanation:

6 0

3 years ago

Find the quotient of 68.0052 and 12. Round your answer to the nearest hundredth. 5.66 5.67 5.07 5.06!

salantis [7]

Answer:

5.67

Step-by-step explanation:

68.0052 divided by 12 = 5.6671

The hundredth place is two digits to the right of the decimal point.

To round this look at the third number to determine whether the 6 in 5.6671 is rounded to 7.
The third digit to the right of the decimal is greater than 5 so the number is rounded to 5.67

3 0

3 years ago