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2 years ago

9

2x(5x-2) expanding brackets

1 answer:

Inga [223]2 years ago

8 0

Step-by-step explanation:

2x(5x-2)

= 2x*5x - 2x*2 (Distributive property)

= 10x^2 - 4x

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Adele ate lunch at a restaurant. The bill came to $90. If she left a 15% tip, how much was the

o-na [289]

Answer:

$13.50

Step-by-step explanation:

The total is $103.50.

4 0

2 years ago

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Use the substitution methods to solve the system of equations. Choose the correct ordered pair. y=7x+8 y=x+20

krek1111 [17]

Answer:

d

Step-by-step explanation:

Solution by substitution method

y=7x+8

∴y-7x=8

and y=x+20

∴y-x=20

Suppose,

-7x+y=8→(1)

and -x+y=20→(2)

Taking equation (1), we have

-7x+y=8

⇒y=7x+8→(3)

Putting y=7x+8 in equation (2), we get

-x + 7x + 8 = 20

6x = 20-8

6x = 12

x= 12 / 6

x = 2

substitute for x in equation (3)

y = 7(x) + 8

y = 7(2) + 8

y = 22

4 0

2 years ago

Liwen and Celina shared some plants in a ratio of 5:6. Celina decided to give Liwen 2/3 of her plants, which left her with 21 fe

djyliett [7]

Answer: 231

<u>Explanation:</u>

Liwen Celina

5x 6x

5x - 21 = $(\frac{2}{3})$ 6x

5x - 21 = 4x

<u>-4x +21</u> <u>-4x +21 </u>

x = 21

Liwen: 5x = 5(21) = 105

Celina: 6x = 6(21) =<u> 126</u>

Total: 231

6 0

2 years ago

What is the cube root of 4096

Readme [11.4K]

The cube root is 16. Often times, teachers just let you use calculators on these questions.

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2 years ago

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Please help me please

Lady_Fox [76]

we are given

sum of three consecutive numbers are 303

Let's assume

first term is a-d

second term is a

third term is a+d

now, we can add them

$a-d+a+a+d=303$

$3a=303$

$a=101$

so, middle term is 101

so, largest term will be greater than middle term

so, largest term must be greater than 101

so, option-A........Answer

6 0

3 years ago