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Zina [86]
3 years ago
6

9x-y x=4 y =9 evaluate

Mathematics
2 answers:
Arisa [49]3 years ago
8 0

Answer:

27

Step-by-step explanation:

9(4)-9= 27

maks197457 [2]3 years ago
5 0

Answer:

27

Step-by-step explanation:

the answer i<em>s 27 because y =9 and X=4 the equation would be 9*4-9 and 9*4 equles 36 -9 witch is 27</em>

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A family has two cars. the first car has a fuel efficiency of 40 miles per gallon of gas and the second has a fuel efficiency of
Aliun [14]
Let x and y represent the numbers of gallons used by the 40 mpg and 35 mpg cars, respectively.
.. x +y = 40 . . . . . . . . . . .total consumption is 40 gallons
.. 40x +35y = 1525 . . . . total miles driven = 1525

Multiply the first equation by 40 and subtract the second.
.. 40(x +y) -(40x +35y) = 40(40) -(1525)
.. 5y = 75
.. y = 15
.. x = 40 -15 = 25

The 40 mpg car consumed 25 gallons.
The 35 mpg car consumed 15 gallons.
7 0
3 years ago
PLEASE HELP! IF YOU DON'T KNOW DON'T ANSWER! 60 POINTS!!
postnew [5]

Answer:

an = 1/2 (4)^ (n-1)

a6 = 512

Step-by-step explanation:

The formula for a geometric sequence is

an = a1 (r)^(n-1)

where an is the term of the sequence

a1 is the initial term of the sequence

r is the ratio

and n is the term number

We know a1 = 1/2 and r =4

I will assume that x=6 means we want to know the 6th term

an = 1/2 (4)^ (n-1)

We want to find the 6th term

a6 = 1/2 * 4^(6-1)

a6 = 1/2 * 4^5

a6 = 512

3 0
3 years ago
How do you expand 6(x + 3y + 2z)
Nadusha1986 [10]
6x+18y+12z

Hope this helps!
4 0
3 years ago
Simplify <br> √<br> 63<br> fully, giving your answer in the form <br> a<br> √<br> b
Misha Larkins [42]

A12

Step-by-step explanation

8 0
2 years ago
Read 2 more answers
The product of 2 and a number x is 3/4 .
Vikki [24]

The appropriate algebraic equation is 2x = 3/4. To solve this for x, multiply both sides of this equation by (1/2), obtaining x = (1/2)(3/4) = 3/8 (answer)

3 0
3 years ago
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