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Arisa [49]
3 years ago
12

9a + 20 = 7a+ 4 a = ? Help please!

Mathematics
1 answer:
shutvik [7]3 years ago
3 0

Answer:

9a+20=7a-20

2a=4-20

a=2-10

A= -8

Step-by-step explanation:

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May somebody help me with this question? It is in the picture.
UNO [17]

Answer:

Step-by-step explanation:

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3 0
3 years ago
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Find equation of a line through 5 -3 that is parallel to y=1/2x+3
xxTIMURxx [149]

Answer:

The equation of a line through (5 -3) that is parallel to y = 1/2 x+3 is

y = - 2 x  + 7

Step-by-step explanation:

Let us assume the slope of the line whose equation we need to find is m 1.

The line parallel to the needed line  is:   y=1/2x+3

Comparing it with the general form: y = m x + C

we get m 2 = 1/2

Now, as Line 1 is Perpendicular to Line 2.

⇒ m 1 x m 2  = -1

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⇒ m 1  = - 2

Also, the point son the line 1 is given as: (x,y)  = (5,-3)

Put the value of point and Slope in y = m x + C to find the value of Y- INTERCEPT.

we get: -3 = (-2) (5) +  C

or, C = -3 + 10 = 7

⇒ C = 7

The general line equation is given as:  y = m x + C

Substituting  the values of C and m, we get:

y = - 2 x  + 7

Hence, the equation of a line through 5 -3 that is parallel to y = 1/2 x+3 is

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8 0
3 years ago
Joe has 17 coins, nickels and dimes, that total up to $1.25. How many nickels does he have?
kifflom [539]

Answer:

9 nickels

Step-by-step explanation:

He has 17 coins.

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$1.25 can only be 17 coins if there were 9 nickels and 8 dimes.


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4 years ago
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enot [183]
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4 years ago
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olga_2 [115]

Answer:

in triangle MNO

relationship between perpendicular and hypotenuse is given by sin angle

sin64°=p/h=70/x

x=70/sin64°=77.88foot

length of MN to the nearest tenth of a foot.

=78ft

6 0
3 years ago
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