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adell [148]
3 years ago
9

Lu is making a quilt that is 20 squares wide and has 15 rows. The border of the quilt is made by using each toy design equally a

s often. Each square can only hold one design. How many of each design does she use for the border? What is the answer, please.
Mathematics
1 answer:
Novosadov [1.4K]3 years ago
5 0

Answer:

70

Step-by-step explanation:

We know that the border will be 20 squares twice, and

 15 squares twice also what is equivalent to the perimeter, because a quilt has 4 sides, with numbers, it would be the following:

20 * 2 + 15 * 2 = 40 + 30 = 70

So the border will have 70 squares in total. So if the border can have a single design, Lu can use any toy design 70 times if he wants the border to have the same toy design.

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Part 1
svetlana [45]

Answer:

A: This polynomial has a degree of 2 , so the equation 12x2+5x−2=0 has two or fewer roots.

B: The quadratic equation 12x2+5x−2=0 has two real solutions, x=−2/3 or x=1/4 , and therefore has two real roots.

Step-by-step explanation:

f(x) = 12x^2 + 5x - 2.

Since this is a quadratic equation, or a polynomial of second degree, one can easily conclude that this equation will have at most 2 roots. At most 2 roots mean that the function can have either 2 roots at maximum or less than 2 roots. Therefore, in the A category, 2nd option is the correct answer (This polynomial has a degree of 2 , so the equation 12x^2 + 5x − 2 = 0 has two or fewer roots).

To find the roots of f(x), set f(x) = 0. Therefore:

12x^2 + 5x - 2 = 0. Solving the question using the mid term breaking method shows that 12*2=24. The factors of 24 whose difference is 5 are 8 and 3. Therefore:

12x^2 + 8x - 3x - 2 = 0.

4x(3x + 2) -1(3x+2) = 0.

(4x-1)(3x+2) = 0.

4x-1 = 0 or 3x+2 = 0.

x = 1/4 or x = -2/3.

It can be seen that f(x) has two distinct real roots. Therefore, in the B category, 1st Option is the correct answer (The quadratic equation 12x2+5x−2=0 has two real solutions, x=−2/3 or x=1/4 , and therefore has two real roots)!!!

8 0
3 years ago
Simplify the expression<br>-7p + -2 + -2 + -10 + -9​
lakkis [162]

Answer:

=−7p−23

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Least to greatest 2.3 2 4/5 2.6
Volgvan
2.3 is smaller than 2.6: we can see it just by looking at the digits from left to right.

now, where does 2\frac{4}{5} stand?

 its fraction part is equal to

\frac{4*2}{5*2}=  \frac{8}{10}

do that means that 2\frac{4}{5}=2.8

which is bigger than 2.6

so the final order is

2.3 2.6 2\frac{4}{5}




5 0
3 years ago
The covered part of this figure is a semicircle. What is the best approximation for the area of this figure?
zalisa [80]

Answer:

 94.18                            

Step-by-step explanation:

Given in the question a semi circle and a right angle triangle

Step 1

Find the diameter of the semi circle

To find the diameter we will use pythagorus theorem

<h3>hypotenuse² = height² + base²</h3>

here,

hypotenuse will be diameter of semicircle

height = 9

base = 4

Plug values in the formula above

diameter = √(9²+4²)

diameter = √97

Step 2

Find radius

<h3>radius = diameter / 2</h3>

Step 3

Area

<h3>π(r)²</h3>

π(√97/2)²

= 76.18

Step 4

Total surface area = area of circle + area of right angle triangle

                               = 76.18 + 1/2(9)(4)

                               = 94.18

6 0
3 years ago
Find the volume of a cone. Use 3.14 for pie. Rounded answer to the nearest 10th (One decimal place).
zlopas [31]
I believe the correct answer is thirty six point seven
5 0
3 years ago
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