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Murrr4er [49]
3 years ago
13

Expand or simplify 3c(5+c) -2(3c-7)​

Mathematics
2 answers:
Luden [163]3 years ago
7 0
3c(5+c) -2(3c-7)
15c+3c^2-6c+14
9c+3c^2+14
ikadub [295]3 years ago
7 0

Answer:

<u>It</u><u> </u><u>is</u><u> </u><u>3</u><u>c</u><u>²</u><u> </u><u>+</u><u> </u><u>9</u><u>c</u><u> </u><u>+</u><u> </u><u>1</u><u>4</u>

Step-by-step explanation:

3c(5 + c) - 2(3c - 7)

open the brackets:

= (15c + 3 {c}^{2} ) - (6c - 14) \\  = (15c  +  {3c}^{2} ) - 6c + 14

express in quadratic equation:

3 {c}^{2}   + 9c  +  14

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A garden has 8 white roses and 11 red roses. One rose is plucked from the garden and then one more rose is plucked without repla
liberstina [14]
P(r/w) is the probability of picking a red rose at first picking and a white rose at second picking.
P(w/r) is the probability of picking a white rose at first picking and a red rose at second picking.

P(r/w) = \frac{11}{19}×\frac{8}{18} = \frac{88}{342}
P(w/r) = \frac{8}{19}×\frac{11}{18}=\frac{88}{342}

Notice that the second fraction is out of 18 because the second picking of rose will be out of 18 since the first rose is not replaced.

P(r/w) equals to P(w/r)
3 0
3 years ago
Write an equation rectangular room 3 meters longer than it is wide and its perimeter is 18 meters
Anon25 [30]

width = x

length = 3 + x

perimeter = x + x + ( 3 + x ) + (3+x)

18 = x + x + ( 3 + x ) + (3+x)

x + x + ( 3 + x ) + (3+x) = 18

6 + 4x = 18

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3 0
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The following section is a statement from the rental agreement Tim signed when he rented his car this past weekend. "Upon checko
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<span>It is cheaper for Tim to return the car on time and pay the refueling costs. If the gas tank on the car is half empty and the rental agency charges $4.50 per gallon the costs to refill for him would be. $27.00 plus the $5.00 refueling fee. This would equal $32.00. If Tim returns the car late, he faces a $32.00 charge including the cost to refuel the car on his own. The cost of returning the car a day late is not the same costs as returning the car on time. Choice b is the better option and the best choice.</span>
8 0
3 years ago
Read 2 more answers
What is 5 times 6 I need to find out plz help
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Spider Rock is located in Canyon de Chelly National Park in Arizona. A surveyor stands 370 feet from the base of Spider Rock. Fr
Leno4ka [110]

Answer:

799 feet

Step-by-step explanation:

We solve using the Trigonometric function of Tangent.

tan theta = Opposite /Adjacent

From the above question, we have the height of the surveyor = 5.5 feet

theta = Angle of elevation = 65°

Adjacent = 370 feet

Let Opposite = height + height of spider rock

tan 65° = h - 5.5 /370 feet

Cross Multiply

tan 65° × 370 feet = h - 5.5

793.46756059 feet = h - 5.5

h = 793.46756059 feet + 5.5

h = 798.96756059 feet

Approximately = 799 feet

The height of the Spider rock = 799 feet

8 0
2 years ago
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