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san4es73 [151]
2 years ago
9

Show your work and solve please!

Mathematics
2 answers:
Nataly_w [17]2 years ago
7 0
Yep they are correct! Mark them brainiest ^^^ (:
bixtya [17]2 years ago
4 0

Answer:

y = 3

Step-by-step explanation:

-5y + 8 = -7

subtract 8 from both sides

-5y = -15

now, divide -5 from both sides

y = 3

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For f(x)= 2x-5 and g(x)= 3-x , find (f (times) g)(-2)
lara31 [8.8K]
f(x)= 2x-5 \\g(x)= 3-x \\\\f(-2)= 2 \cdot (-2)-5 =-4-5=-9\\\\g(-2)=3-x=3-(-2)=3+2=5\\\\ (f \cdot g)(-2)=f(-2)\cdot g(-2)= (-9)\cdot 5=-45


8 0
3 years ago
Answer for brainliest, 5 stars, plus thanks (perimiter of a right triangle 6th grade math)
yarga [219]
18 should be the answer if not I’m sorry I just need this as a step
7 0
3 years ago
Y = -7x + 8 <br> Write in standard form
Scrat [10]

Answer:

y = -7x + 8

Step-by-step explanation:

that is standard form because you can't simplify it.

3 0
2 years ago
When the velocity v of an object is very​ large, the magnitude of the force due to air resistance is proportional to v squared w
Sati [7]

Answer:

Step-by-step explanation:

The model fo the shell is given by the following equation of equilibrium:

\Sigma F = -b\cdot v^{2} - m\cdot g = m\cdot \frac{dv}{dt}

This first-order differential equation has separable variables, which are cleared herein:

\int\limits^t_{0\,s} \, dt = -\frac{m}{b} \int\limits^{0\,\frac{m}{s} }_{600\,\frac{m}{s} } {\frac{1}{ v^{2}+\frac{m}{b}\cdot g } } \, dv

The solution of this integral is:

t = -\frac{m}{2b}\cdot \left[\tan^{-1} \left(\frac{v}{\sqrt{\frac{m\cdot g}{b} } }\right) - \tan^{-1} \left(\frac{600}{\sqrt{\frac{m\cdot g}{b} } }\right)\right]

\tan^{-1} \left(\frac{v}{\sqrt{\frac{m\cdot g}{b} } }  \right)=-\frac{2\cdot b\cdot t}{m} + \tan^{-1}\left(\frac{600}{\sqrt{\frac{m\cdot g}{b} } }  \right)

\frac{v}{\sqrt{\frac{m\cdot g}{b} } }=\tan \left[-\frac{2\cdot b\cdot t}{m} + \tan^{-1}\left(\frac{600}{\sqrt{\frac{m\cdot g}{b} } }  \right)\right]

v = \sqrt{\frac{m\cdot g}{b} } \left [\frac{\tan \left(-\frac{2\cdot b \cdot t}{m}  \right)+ \left(\frac{600}{\sqrt{\frac{m\cdot g}{b} } }  \right)}{1 - \left(\frac{600}{\sqrt{\frac{m\cdot g}{b} } }  \right)\cdot \tan \left(-\frac{2\cdot b \cdot t}{m}  \right) }\right]

4 0
3 years ago
Ayuda por fa es para hoy
kykrilka [37]

Translation: please help it's due today

Would love to help but there is no question to answer

7 0
1 year ago
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