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3 years ago

Simplify this expression: (3s13)(9s-5)

Mathematics

2 answers:

MA_775_DIABLO [31]3 years ago

5 0

Step-by-step explanation:

$(3s^{13})(9s-5)\qquad\text{use the distributive property}\ a(b-c)=ab-ac\\\\=(3s^{13})(9s)-(3s^{13})(5)\\\\=27s^{14}-15s^{13}$

Lynna [10]3 years ago

3 0

Answer: 39s(9s-5)

Step-by-step explanation:

(3s*13) (9s-5)

remove the parenthesis ex: (a)=a

3s*13 (9s-5)

Multiply the numbers

39s(9s-5)

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Which value must be added to the expression x2 + 12x to make it a perfect-square trinomial?

Kipish [7]

X^2+12x=0
(ax^2+bx)=0
(b/2)^2=(12/2)^2=(6)^2=36
x^2+12x+36=(x+6)^2

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3 years ago

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In your computation, approximate its value as 3.14.

andrey2020 [161]

Answer: d

Step-by-step explanation:

Find the area of the rectangle.

$A=l*w\\A=(15in)(12in)\\A=180in^2$

Find the area of the base of the semicircle.

$A=\pi r^2$

12 in would be the diameter, divide by 2 to get the radius.

$\frac{12}{2}=6$

Plug this into the formula.

$A=(3.14)(6)^2\\A=113.04in^2$

Since we do not have a full circle but a semi one instead, we must divide our result by 2.

$\frac{113.04}{2}=56.52in^2$

Add both areas.

180+56.52=236.52 $in^2$

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3 years ago

Yasmeen bought 16 pizzas for her grade level classes.

torisob [31]

Answer:

183.20

Step-by-step explanation:

9.95x16=159.20

159.20+24=183.20

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3 years ago

What is 4/5 * 6 HELP ME PLEASE

Vesnalui [34]

Answer:

4 4/5 miles

Step-by-step explanation:

We want to multiply 4/5 * 6

4/5 * 6/1

24/5

We need to change this back to a mixed number

5 goes into 24 4 times (4*5 = 20 with 4 left over)

4 4/5 miles

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3 years ago

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Determine all values of k for which the roots of the equation x^2-6x+k=0 are complex

MaRussiya [10]

Complex roots occur when b^2 - 4ac is negative.

So we have (-6)^2 - 4.1.k < 0
-4k < - 36
k > 9

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3 years ago