3 years ago

(7x^2)(2x^3+5)(x^2-4x-9)

Mathematics

1 answer:

barxatty [35]3 years ago

7 0

The answer is:

14x^7 - 56x^6 - 126x^5 + 35x^4 - 140x^3 - 315x^2

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780 students stand in rows and columns. each row has an equal number of students and each column has an equal number of students

Alex73 [517]

Answer:

Step-by-step explanation:

x = number of rows

780=x(x+4)

$780=x^{2} +4x$

$x^{2} +4x-780=0\\(x+26)(x-30)=0\\x=30 \\x\neq -26\\$

there are 26 rows and 30 students in each row 26*30=780

8 0

3 years ago

Make a the subject of the formula x²=a²-a²w²

Gwar [14]

Answer:

a = ± $\sqrt{\frac{x^2}{1-w} }$

Step-by-step explanation:

Given

x² = a² - a²w ← factor out a² from each term on the right side

x² = a²(1 - w) ← divide both sides by (1 - w)

$\frac{x^2}{1-w}$ = a² ( take the square root of both sides )

± $\sqrt{\frac{x^2}{1-w} }$ = a

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3 years ago

Can someone please please please help me it’s ergent

JulsSmile [24]

Answer:

D 192

Step-by-step explanation:

used: new: total

4: 1 : 5

We have 240 stamps

240/5 = 48

Multiply each number by 48

used: new: total

4*48: 1*48 : 5*48

192 : 48 : 240

There are 192 used stamps and 48 new stamps in his collections

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4 years ago

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0.90 divided by 0.30 PLEASE SHOW WORK OR EXPLAIN YOUR REASONING!

worty [1.4K]

How many times does 0.30 fit in 0.90? Well, exactly 3 times since 9 is 3 times more than 3!

Hope this helps!

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3 years ago

Read 2 more answers

2. Mrs. Morrison asked the class to generate an expression equivalent to 80. Lucy used the prime

Sauron [17]

33+55

you would do 33+55

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3 years ago