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Mnenie [13.5K]
3 years ago
10

X=-3y-5 3x+9y=7 how can u solve this?

Mathematics
2 answers:
pentagon [3]3 years ago
5 0

Answer:


Step-by-step explanation:


yulyashka [42]3 years ago
5 0

Answer:

No solution

Step-by-step explanation:

x=-3y-5.....(1)

3x+9y=7.....(2)

from equation (2)

3(-3y-5)+9y=7

combine

-9y-15+9y=7

collect the like terms

-9y+9y=7-15

0=-8

No solution


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How far does the tip of the minute hand of a clock move in 1 hour and 27 minutes if the hand is 2 inches long?
Nesterboy [21]
So, a full circle has 360°, thus when the minute hand does one hour, it does a full circle, therefore 360°.

now, how many degrees are there in 1 minute?  well, there are 60 minutes in 360°, therefore there are 360/60 degrees in 1 minute, or 6°.

now, we know in 1 hour there are 360°, how many in 27 minutes?  well, 27 * 6, or 162°.  So after 1hr and 27min, the minute hand has done 360+162 or 522°.

we also know the minute hand is 2 inches long, thus

\bf \textit{arc's length}\\\\
s=\cfrac{\pi \theta r}{180}\quad 
\begin{cases}
r=radius\\
\theta =angle~in\\
\qquad degrees\\
------\\
r=2\\
\theta =522
\end{cases}\implies s=\cfrac{\pi \cdot 522\cdot 2}{180}


which is roughly 18 inches rounded up.
5 0
3 years ago
Deloria says she can find the relative frequency of nuts based on another relative frequency. What might she be doing?
forsale [732]

Answer:

frequency of nuts based on another relative frequency. What might

she be doing

nuts:3/30=15%

3 0
3 years ago
Which of the following is a point-slope equation of a line that passes through
Mademuasel [1]

Answer:

The Answer is: y = -2/3x + 10/3

Step-by-step explanation:

Given points (-1, 4) and (8, -2) first find the slope:

m = (y - y1)/(x - x1)

m = (4 - (-2)) / (-1 - 8)

m = 4 + 2 / -9

m = -6/9 = -2/3

Use the point slope form and point (8, -2) and slove for y:

y - y1 = m(x - x1)

y - (-2) = -2/3(x - 8)

y + 2 = -2/3x + 16/3

y = -2/3x + 16/3 - 2

y = -2/3x + 16/3 - 6/3

y = -2/3x + 10/3

Proof using the point (-1, 4):

f(-1) = -2/3(-1) + 10/3

= 2/3 + 10/3

= 12/3 = 4, giving point (-1, 4)

Hope this helps! Have an Awesome Day!! :-)

4 0
3 years ago
Help please asappp!!!!!!!!!!!!!!!!!!
mario62 [17]

I think the answer is B! I hope that helps!!!!!

BRAINLY would be appreciated❤️

4 0
2 years ago
What value is equivalent to 108-8x(5-2)-60
emmasim [6.3K]

Answer:

-28    +    -1    =    -29

     -14    +    -2    =    -16

     -7    +    -4    =    -11

     -4    +    -7    =    -11

     -2    +    -14    =    -16

     -1    +    -28    =    -29

     1    +    28    =    29

     2    +    14    =    16

     4    +    7    =    11

     7    +    4    =    11

     14    +    2    =    16

     28    +    1    =    29

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
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