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1 year ago

Select all the situations where knowing the surface area of an object would be useful.

Mathematics

2 answers:

netineya [11]1 year ago

4 0

C. How much wrapping paper a gift will need

Marysya12 [62]1 year ago

4 0

Answer:

maybe B,C and D maybe

Step-by-step explanation:

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Hange 27 centimeters to millimeters. A) 2.7 mm B) 27 mm C) 270 mm D) 2700 mm

polet [3.4K]

Since 1 cm = 10 mm,

27 × 10 = 270

The answer is C.

7 0

3 years ago

(15, 0 ) (3,−3)

UkoKoshka [18]

The slope of the line is 1/4

5 0

3 years ago

Read 2 more answers

Plz help me with this

Marrrta [24]

Answer: c) 3

Step-by-step explanation:

Plug in y = -9 and the given x-value to see if it makes a true statement.

a) -4.5 falls in the piecewise function x < -3 --> y = -x

y = -x

-9 = -(-4.5)

-9 = 4.5 FALSE

b) -3 falls in the piecewise function -3 ≤ x ≤ -2 --> y = 2x

y = 2x

-9 = 2(-3)

-9 = -6 FALSE

c) 3 falls in the piecewise function x > -2 --> y = -x²

y = -x²

-9 = -(-3)²

-9 = -9 TRUE

d) 9 falls in the piecewise function x > -2 --> y = -x²

y = -x²

-9 = -(9)²

-9 = -81 FALSE

4 0

3 years ago

The results of joes survey show that baseball is the favorite sport for 18 out of 25 people. What percent do not like sports?

charle [14.2K]

well if 18 out of 25 like it, then the remaining 7 doesn't like it, namely 7 out of 25.

if we take 25 to be the 100%, what is 7 off of if in percentage?

$\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 25&100\\ 7&x \end{array}\implies \cfrac{25}{7}=\cfrac{100}{x}\implies 25x=700\implies x=\cfrac{700}{25}\implies x=28$

7 0

2 years ago

40x=10x^2+41 Identify the number of solutions and their types using the discriminant

nydimaria [60]

Number of solutions: no roots

Type of solution: Not Real

Step-by-step explanation:

We need to identify the number of solutions and their types using the discriminant.

We are given: $40x=10x^2+41\\$

Rearranging:

$40x-10x^2-41=0\\10x^2-40x+41=0$

Discriminant can be found by: $b^2-4ac$

where b=-40, a=10 and c=41

Putting values:

$b^2-4ac\\=(-40)^2-4(10)(41)\\=1600-1640\\=-40\\$

So, Discriminant is -40

If the discriminant is less than zero i.e -40 then there are no real roots.

So, Number of solutions: no roots

Type of solution: Not Real

Keywords: discriminant

Learn more about discriminant at:

#learnwithBrainly

6 0

3 years ago