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3 years ago

1-7x-7=15 Solve Please I don't know.

Mathematics

2 answers:

Trava [24]3 years ago

6 0

Answer:

-3

Step-by-step explanation:

1) first combine all the like terms(terms with same variables or terms without any variable) together

1-7=-6

-6-7x=15

add 6 on both sides to remove it

-7x=21

divide both sides by -7

x=-3

Hope this helps

DIA [1.3K]3 years ago

4 0

Answer:

Step-by-step explanation:

So first we combine like terms on the left

1-7=-6

then we have

-7x-6=15

next we add 6 both sides

-7x-6=15

+6 +6

-7x=21

then we divide -7 each side

we get

x=-3

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3 years ago

Can someone check me answers to see if I’m right

dybincka [34]

Answer:

Question one: 3rd option

(Pt. 2 written):

b=ac^2

b=1/8 (4)^2

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v= -2+7

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(Pt. 2 written):

q=ps/r

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(Pt. 2 written):

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x=wy+z

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8 0

4 years ago

How many 3-letter sequences can be formed if the second letter must be a vowel (A, E, I, O, or U), and the third letter must be

erica [24]

Answer:

120 ways

Step-by-step explanation:

Given that, 3-letter sequences should be formed, where the second letter must be a vowel (A, E, I, O, U) and the third letter must differ from the first letter.

There are 26 alphabets in English,

so, firstly let us fix the second letter to be one of the vowels

now we are left with 25 alphabets and now let us fix the third letter to be an alphabet from the remaining 25 alphabets.

now, we are left with 24 alphabets and the first letter can be any of these 24 alphabets.

so, there are 24 ways to fill the sequence.

The same thing can be done with the other 4 vowels.

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3 years ago

Layala and Zahra have 2700 marbles in the ratio of 2:7. How many marbles Zahra must have gave away so that they both would have

Zolol [24]

Answer:

1500

Step-by-step explanation:

Given that :

Total number of marbles held by Layala and Zahra = 2700

Ratio = 2 : 7

Layala's share of marbles : (2 / (2+7)) * 2700

= 2/9 * 2700

= 600

Zahra's share of marble : (7 / (2+ 7)) * 2700

= 7 / 9 * 2700

= 2100

Hence, Zahra must have given away (2100 - x) = 600

2100 - 600

= 1500 marbles, so that both Zahra and Layala have the same number of marbles

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Answer:

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Step-by-step explanation:

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3 years ago

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