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lions [1.4K]
3 years ago
12

Determine the number of solutions: 2x-7=3x+8

Mathematics
2 answers:
Alborosie3 years ago
8 0

Answer:

x=-15

Step-by-step explanation:

siniylev [52]3 years ago
5 0

Answer:

1 solution

Step-by-step explanation:

2x-7+3x+8

add 7 to both sides

2x=3x+15

subtract 3x from both sides

-1x=15

divide both sides by -1

x=-15

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What is (-7)^2 × (-7)?<br><br> I will mark the Brainliest, thank, and comment!<br><br> Thank you!
belka [17]

Answer:

The answer is -343.

Step-by-step explanation:

If a term doesn't have an exponent, it's considered that the exponent is 1 (so basically, (-7)² x (-7)^1.

Multiply the terms with the same base (by adding the exponents - (-7)²+1<- (as the exponential value) (couldn't find the sign so sorry.)

Add the numbers: (-7)³

A negative base raised to an odd power equals a negative: -7³

Write the problem out: -(7 x 7 x 7).

Multiply: -343

3 0
3 years ago
40.51x+12.45y=666.64
irga5000 [103]

Answer:

The graph of the equation 40.51x+12.45y=666.64 is attached with the answer where the horizontal axis represents the X axis and the vertical axis represents Y axis.

To plot the graph physically just find two points lying on the line. Mark the points on the graph sheet and then join them. This will give you the line represented by the equation.

To find points on the line assume the value of any one variable, substitute it in the equation, then solve the equation to find the value of other variable. For example : assume y = 1; substitute the value of y in the equation;

⇒ 40.51x + 12.45×1 = 666.64

⇒ 40.51x = 666.64 - 12.45

⇒ 40.51x = 654.19

⇒ x = \frac{654.19}{40.51}

⇒ x ≈ 16.149

Therefore point ( 16.149 , 1 ) lie on the graph of the equation.

***Only two points are required to plot this graph just because it represents a straight line, that we can conclude just by observing the equation. If in an equation the power of x is 1 or 0 and power of y is 1 or 0 then only it will represent a straight line in 2-D plane.***

5 0
3 years ago
The price of bananas went from $0.20 per lb to $0.60 per lb in four years. Find the rate of change of the price of bananas
MrMuchimi
$0.10 a year
$0.20-$0.60
=.40
.40/4=10
6 0
4 years ago
Read 2 more answers
What is the greatest common factor of 9 21 60?
nordsb [41]
The greatest common factor (GCF) of 9, 21 and 60 is: 3

Factors of 9: 1, 3, 9
Factors of 21: 1, 3, 7
Factors of 60: 1, 2, 3, 4, 5, 6

The common factors between the three numbers are 1 and 3, but since 3 is the highest number, it is considered the GCF.
8 0
3 years ago
Earl runs 35 meters in 10 seconds. How many meters does Earl run per second?
liraira [26]
If  he ran 35 meters in 10 seconds, how many meters did he run in a second?
35m=10s
   ?   =1
1/10*35m=3.5m
Therefore he ran 3.5 meters in a second.

8 0
3 years ago
Read 2 more answers
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