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____ [38]
3 years ago
15

Solve for x. 7(x - 3) = 4(x + 5)

Mathematics
1 answer:
Solnce55 [7]3 years ago
6 0
7(x-3) = 4(x+5)
7x - 21 = 4x + 20
7x - 4x = 20 + 21
3x = 41
x = 41/3
x = 13.67
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One apple and three oranges cost $5.10 and another 5 oranges and one Apple cost $7.50 what is the price of one apple and one ora
alekssr [168]

Answer:

$2.7

Step-by-step explanation:

Let the price of one apple be x

and the price of one orange y

Hence ;

One apple and 3 oranges would cost:

x + 3×y = $5.10----------------------------(1)

One apple and 5 oranges would cost;

x + 5×y = $7.50--------------------------(2)

Subtracting eqn (1) from (2), we have :

x-x + 5y -3y = 7.5- 5.1

2y = 2.4

y = $1.2

From eqn(1)

x + 3y = $5.10

x= $5.10-3($1.2) = $5.10-$3.6 = $1.5

Hence x=$1.5 and y= $1.2

We are required to find the cost of one apple and one orange, hence :

x+y = $1.5+$1.2= $2.7

4 0
3 years ago
( 8k + 9) - (6k + 5)
Katena32 [7]

Answer:

The expression is 2k + 4.

Step-by-step explanation:

You have to collect like-terms :

(8k + 9) - (6k + 5)

= 8k + 9 - 6k - 5

= 2k + 4

3 0
3 years ago
Read 2 more answers
A rectangular prism has a length of 1 1/2 meters, a width of 3 meters, and a height of 5 1/2 meters.
denpristay [2]

Answer:

13m

Step-by-step explanation:

because i use calculator soup

4 0
2 years ago
Read 2 more answers
What is 100 divided by 6
iren2701 [21]
100/6 = 16.66 rounds to 16.7
6 0
3 years ago
3 over 5 x minus 15 = 6 over 5 x plus 12
poizon [28]
3 over 5 x minus 15 = 6 over 5 x plus 12

3/5x - 15 = 6/5x +12
-3/5x+3/5x-15=6/5x-3/5x+12 subtraction property
-15=3/5x+12 simplified
-12-15=3/5x+12-12 subtraction property
-27=3/5x simplified
(5/3)(-27)=3/5 (5/3)x multiplicative inverse
-45=x
8 0
3 years ago
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