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3 years ago

Please help with this

Mathematics

1 answer:

MatroZZZ [7]3 years ago

4 0

I believe it's D. It helps if you use pemdas but. That is just me. Hope it helped!

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6x - 8 ≤ 184 i need answer for test corrections

jekas [21]

I hope this helps.....

Explanation:
I took this in 9th grade so I know how to do this kind of stuff

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2 years ago

If you are buying $48 worth of two types of lawn seed. Ryegrass lawn seed sells for $0.70 per pound and Fescue lawn seed sells f

ikadub [295]

Answer:

.70(x)+1.15(25)=48

Step-by-step explanation:

8 0

2 years ago

PLEASE HELP ME!!!! WORTH 10 POINTS!!!

Sidana [21]

slope
m = (1 - 1)/(0 + 2) = 0

(x1, y1) as (-2, 1)

point-slope form
y - y1 = m(x - x1)
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3 years ago

Which country like ghana

vaieri [72.5K]

Answer:

Ghana is a very beautiful country even in the history, Ghana's empire was a very legendary in Africa. There are many countries like Ghana in Africa like Benin, Sierra Leone, Mali, Songhai, Zimbabwe and Togo also Ivory Coast and Niger

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2 years ago

The altitude of a triangle is increasing at a rate of 1 cm/min while the area of the triangle is increasing at a rate of 2 cm^2/

VARVARA [1.3K]

Answer:

The base is decreasing at 2 cm/min.

Step-by-step explanation:

The area (A) of a triangle is given by:

$A = \frac{1}{2}bh$ (1)

Where:

b: is the base

h: is the altitude = 10 cm

If we take the derivative of equation (1) as a function of time we have:

$\frac{dA}{dt} = \frac{1}{2}(\frac{db}{dt}h + \frac{dh}{dt}b)$

We can find the base by solving equation (1) for b:

$b = \frac{2A}{h} = \frac{2*120 cm^{2}}{10 cm} = 24 cm$

Now, having that dh/dt = 1 cm/min, dA/dt = 2 cm²/min we can find db/dt:

$2 cm^{2}/min = \frac{1}{2}(\frac{db}{dt}*10 cm + 1 cm/min*24 cm)$

$\frac{db}{dt} = \frac{2*2 cm^{2}/min - 1 cm/min*24 cm}{10 cm} = -2 cm/min$

Therefore, the base is decreasing at 2 cm/min.

I hope it helps you!

7 0

2 years ago