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Rainbow [258]
3 years ago
5

Factor 20x2 + 25x – 12x – 15 by grouping. 1. Group terms with common factors. 2. Factor the GCF from each group. 3. Write the po

lynomial as a product of binomials.
Mathematics
2 answers:
a_sh-v [17]3 years ago
8 0

Answer:

(5x - 3) • (4x + 5)

Step-by-step explanation:

RUDIKE [14]3 years ago
5 0
<span>Step 1:
</span>
<span> (((22•5x2) + 25x) - 12x) - 15)))

</span>
<span>The first term is, <span> <span>20x2</span> </span> its coefficient is <span> 20 </span>.
The middle term is, <span> +13x </span> its coefficient is <span> 13 </span>.
The last term, "the constant", is <span> -15



</span></span>
<span>step 2 above,  -12  and  25 
                     <span>20x2 - 12x</span> + 25x - 15

Step-4 : Add up the first 2 terms, pulling out like factors :
                    4x • (5x-3)
              Add up the last 2 terms, pulling out common factors :
                    5 • (5x-3)
Step-5 : Add up the four terms of step 4 :
                    (4x+5)  •  (5x-3)
             Which is the desired factorization</span>Final result :<span> (5x - 3) • (4x + 5) </span>
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South School has a circular pattern on the playground that has a radius of 6 feet. Find a. the circumference of the pattern and
katrin [286]

Answer:

Circumference: 37.68

Area: 113.04

Step-by-step explanation:

the formula to find the circumference is 2 x 3.14 x r

r is the radius so you plug in 6 for that

2 x 3.14 x 6 = 37.68

the formula to find the area of a circle is 3.14 x r ²

r is still the radius so you plug in 6 for that

3.14 x 6² = 113.04

6 0
3 years ago
Tickets for a school play sold for $7.50 for each adult and $3.00 for each child. The total receipts for 118 tickets totaled $69
NeX [460]
X= number of adult tickets
y=number of child tickets.
we can suggest this system of equations: 
x+y=118                 ⇒x=118-y
7.5x+3y=696

we can solve this system of equations by substitution method:
7.5(118-y)+3y=696
885-7.5y+3y=696
-4.5y=-189
y=-189/-4.5
y=42

x=118-y
x=118-42
x=76

Answer: the number of adult tickets sold was 76. 
7 0
3 years ago
Write log6 5 as a logarithm of base 4.
STatiana [176]

Answer:

It is a).

Step-by-step explanation:

The rule for change of base of a log is:

logb x =  = loga x / loga b

So we have

log6 5 = log4 5 / log4 6.

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3 years ago
Which phrase describes an unknown or changeable quantity? A. 60 seconds multiplied by 5 B. 2 times the number of pages in the bo
Anna [14]
A.) cause you can’t take away or add seconds
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3 years ago
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Beth has a summer job that pays $9.76 an hour. She will be paid time-and-a-half for all hours over 40. Her boss told her that sh
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