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4 years ago

What’s the value of the ratio 21:45

Mathematics

2 answers:

katrin [286]4 years ago

6 0

Answer:

7:15

Step-by-step explanation:

21:45

21/3 = 7 and 45/3 = 15

Thus, 21:45 ratio simplified is 7:15

hichkok12 [17]4 years ago

3 0

Answer:

im not sure but I think it's 1.5

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Pls help and do quick!

motikmotik

Answer:

If 50.24cm = Circumference

Radius = 8cm

If 50.24cm^2 = Area

Radius = 4cm

Step-by-step explanation:

50.24cm what? Circumference? Area?

π = 3.14

2πr = Circumference

50.24 / 2π = r

r = 8

πr^2 = Area

50.24 / π = r^2

r^2 = 16

r = 4

7 0

2 years ago

Please help!!!

Nonamiya [84]

Answer:

c. $2a^3x^4-3a^3x^3+a^4x^2$

d. $63x^5y^3-30x^2y^4-7x^3y^2$

Step-by-step explanation:

For this exercise you need to remember the following:

1. The multiplication of signs:

$(+)(+)=+\\(-)(-)=+\\(-)(+)=-$

2. The Product of powers property, which states that:

$(a^m)(a^n)=a^{(m+n)}$

3. The Distributive property:

$a(b\±c)=ab\±ac$

Knowing that, you can solve the multiplication of the polynomials:

c. $(-2ax^2+3ax-a^2)(-a^2x^2)=\\\\=(-2ax^2)(-a^2x^2)+(3ax)(-a^2x^2)+(-a^2)(-a^2x^2)=2a^3x^4-3a^3x^3+a^4x^2$

d. $(6.3x^3y-3y^2-0.7x)(10x^2y^2)=\\\\=(6.3x^3y)(10x^2y^2)+(-3y^2)(10x^2y^2)+(-0.7x)(10x^2y^2)=63x^5y^3-30x^2y^4-7x^3y^2$

8 0

3 years ago

Peyton wrote this expression to describe the amount he paid for each sandwich that costs the same amount. Which situation could

Leno4ka [110]

I think it is d because it would be 15 x b = 60. Hope I got this right

6 0

3 years ago

When x=1/3. what is the value of 3x+3/x

Dvinal [7]

3(1/3) + 3/(1/3) = 1+9
Answer : 10

3 0

2 years ago

Uhh i just need to know if i did this right or not

choli [55]

Yea you did. If you want further explanation let me know.

6 0

3 years ago

Read 2 more answers