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bazaltina [42]
3 years ago
8

Solve the equation. -5r-1=7r+5

Mathematics
2 answers:
irga5000 [103]3 years ago
8 0

Answer:

r=-1/2

Step-by-step explanation:

(-5*-1/2=2.5)( 2.5-1=1.5) (7x -1/2= -3.5)-3.5+5 =1.5

Ksivusya [100]3 years ago
3 0

Answer:

-1/2

Step-by-step explanation:

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The concentration of a drug in the body decreases exponentially after a dosage is given. In one clinical study, adult subjects a
Yanka [14]

Answer:

Step-by-step explanation:

14 = 1000 e^{ k*1}

.014 = e^{k*1}

ln(.014) = k ln(e)

k = -4.268

~~~~~~~~~~~~~~~~~~

after 3 hrs

1000 e^{ -4.268*3}

0.00274

~~~~~~~~~~~~~~~

4 = 1000 e^{ -4.268*t}

.004 =  e^{ -4.268*t}

ln(.004)/-4.268 = t

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4 0
3 years ago
Given the figure below, find the values of x and z.<br> (5x + 86)<br> (10x + 34)<br> X =<br> Z=
kolezko [41]

Answer:

x = 4 \\ z = 106

Step-by-step explanation:

(5x + 86) + (10x + 34) = 180 \\ 15x + 120 = 180 \\ 15x = 180 - 120 \\ 15x = 60 \\  \\ x =  \frac{60}{15}  \\  \\ x = 4

(5x + 86) = 5(4) + 86 = 20 - 86 = 106

Z= 106 —> Opposite angles

I hope I helped you^_^

8 0
2 years ago
Solve using order of operation <br>-3x2 + (-10)÷(-2)=​
timama [110]

Answer:

-1

Step-by-step explanation:

10/2=5+ -3*2=-1

7 0
3 years ago
ANSWER FAST PLS ILL MARK AS BRAINLIST write an expression that is equivalent to 3/4a + 2,3 - 1/2a -1/3 + 1/2a
maksim [4K]
6/8a+4,6-2/4a. I think that this is the answer.
3 0
3 years ago
Read 2 more answers
The diameter of a circle is 10 in. Find its area in terms of pie.
kumpel [21]

Answer:

The diameter of the circle = 10 cm

The radius of the circle= 10/2= 5 cm

Step-by-step explanation:

Area of the circle = pi r^2

= pi 5^2

=3.14 *25

= 78.5 cm ^2

7 0
3 years ago
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