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Lisa [10]
3 years ago
13

7x + 10 - 18 + 2x = 55

Mathematics
1 answer:
Serga [27]3 years ago
5 0

Answer:

7

Step-by-step explanation:

add the like terms,

9x - 8 = 55

9x = 63

x = 63 ÷ 9

x = 7

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the straight line L has the equation 4y=5x+3. Point A has the coordinates (3,-2) Find the equation of the line straight line tha
Aleonysh [2.5K]

Answer:

y = - \frac{4}{5} x + \frac{2}{5}

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Rearrange 4y = 5x + 3 into this form by dividing the 3 terms by 4

y = \frac{5}{4} x + \frac{3}{4} ← in slope- intercept form

with slope m = \frac{5}{4}

Given a line with slope m then the slope of a line perpendicular to it is

m_{perpendicular} = - \frac{1}{m} = - \frac{1}{\frac{5}{4} } = - \frac{4}{5} , thus

y = - \frac{4}{5} x + c ← is the partial equation

To find c substitute (3, - 2) into the partial equation

- 2 = - \frac{12}{5} + c ⇒ c = - 2 + \frac{12}{5} = \frac{2}{5}

y = - \frac{4}{5} x + \frac{2}{5} ← equation of perpendicular line

4 0
3 years ago
a shop owner bought 30 folders and some journals.he paid $82.50 for the folders.Each journal costs 10 times as much as a folder
NeTakaya
To solve this one just take 82.50/30=2.75 we use these numbers because we need to divide the total price by the amount bought to see the unit price. Next we take 2.75*10 because the folders are 10x cheaper then the journals which is 27.5. So we now know that each journal costed 27.5 

Enjoy!=)
7 0
3 years ago
Read 2 more answers
6.01 what is the value of the expression 2 + 3² • (4 - 1)
Advocard [28]

Answer:

29

Step-by-step explanation:

using pemdas, you first need to solve 3² which is 9. Then you do what's in the parenthesis (4-1) which is 3. you'll first multiply 9 and 3 (27) add the 2 and there's your answer, 29.

6 0
3 years ago
Read 2 more answers
PLEASE ANSWER ASAP! *picture attached*
Aleonysh [2.5K]

Answer:

= x {}^{2}  + 1 + (5 - x) \\  = x {}^{2}  + 1 + 5 - x \\  = x {}^{2}  - x + 6

5 0
3 years ago
Solve: 6 and 2/5 divided by 4/5
LiRa [457]

Answer:

where does 6 fit into the equation?

Step-by-step explanation:

3 0
3 years ago
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