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Romashka [77]
3 years ago
13

(2x+5) ^3 in standard form

Mathematics
1 answer:
ludmilkaskok [199]3 years ago
3 0

Answer:

8x^3+60x^2+150x+125

Step-by-step explanation:

(2x+5)^3=(2x+5)(2x+5)^2 =

(2x+5)(4x^2 +2*2x*5+25)=

(2x+5)(4x^2 +20x+25)=

(2x*4x^2 +2x*20x+2x*25+5*4x^2+5*20x+5*25)=

8x^3+40x^2+50x+20x^2 +100x+125=

8x^3+60x^2+150x+125

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Malcolm Little High School has sopho- mores, juniors, and seniors, but no freshmen. The ratio of sophomores to juniors is 5 to 4
djverab [1.8K]

Answer:

161 seniors

Step-by-step explanation:

According to the problem, given data are as follows:

Total number of sophomores = 300

Sophomores to junior ratio = 5:4

So, Number of Juniors = 300 ×  (4 ÷ 5)

= 240

Now, Juniors to senior ratio = 3:2

So, we can calculate the number of seniors by using following method:

Number of seniors = 240 × ( 2 ÷ 3)

= 240 × 0.67

= 160.8 or 161

6 0
3 years ago
A. What is an equation of the line with slope -1/2 and y-intercept 2??
Brrunno [24]

Answer:

y = -(1/2)x + 2

Step-by-step explanation:

6 0
3 years ago
A collection of dimes and nickels is worth $8.40 there are 106 coins how many of each are there
kotegsom [21]
There are 62 dimes and 44 nickels.

N + D = 106 (There are 106 coins in all.)
1 nickel = 5 cents.
1 dime = 10 cents.
5*N + 10*D = 840 ($8.40 = 840 cents)
N + D = 106 -------(1)
N = (106 - D)
5*N + 10*D = 840 ---------(2)
5*(106-D) + 10*D = 840
530 - 5*D + 10*D = 840
5*D = 840 - 530
5*D = 310
D = 310/5 = 62
Eq(1) N + D = 106
N + 62 = 106
N = 106 - 62
N = 44
7 0
3 years ago
Pls answer 2,3,5,6 and thank you for helping and pls work it out
skad [1K]

Answer:

2: add 4

3: 6

5: multiply by 2

6: 7

Step-by-step explanation:

7 0
3 years ago
Solve for x. -5 + 5x = -(1 - 6x)
choli [55]

- 5 + 5x = - 1 + 6x

- 5 + 5 + 5x = - 1 + 5 + 6x

5x = 4 + 6x

5x - 6x = 6x - 6x + 4

- x = 4

x = - 4

4 0
2 years ago
Read 2 more answers
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