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3 years ago

Mrs.Tong is baking brownies for a school party.The

Mathematics

1 answer:

Sergeeva-Olga [200]3 years ago

6 0

Answer:

D 5:1

Step-by-step explanation:

45 brownies

9 eggs

brownies to eggs

45:9

simplify 45/9 using the common denominator which is 9 divide numerator and denominator which equals 5:1

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Find the surface area of a rectangular prism that has the following dimensions.

son4ous [18]

Answer:

Surface Area is 306

Step-by-step explanation:

I go on googlw and ask what the area is and google for sum reason only gives surface area and not area so I guess thins time it worked out!

Here's the link:

https://www.google.com/search?surl=1&rlz=1CAZGSZ_enUS814&ei=F4HUXM7LEZPZ9AOYv5nQBg&q=what+is+the+area+of+a+rectangular+prism&oq=what+is+the+area+of+a+rectangler+prism&gs_l=psy-ab.12...0.0..94365...0.0..0.0.0.......0......gws-wiz.o7r-UZ2uYlg&safe=active&ssui=on

3 0

3 years ago

Read 2 more answers

Use the chain rule calculate dw/dr , dw/ds and dw/dt

Liono4ka [1.6K]

Answer:

$\frac{dw}{dr} = \frac{8\cdot r}{4\cdot r^{2}-t^{2}+5\cdot s^{2}}$ , $\frac{dw}{ds} = \frac{10\cdot s}{4\cdot r^{2}-t^{2}+5\cdot s^{2}}$ , $\frac{dw}{dt} = -\frac{2\cdot t}{4\cdot r^{2}-t^{2}+5\cdot s^{2}}$

Step-by-step explanation:

We proceed to derive each expression by rule of chain. Let be $w = \ln (x+2\cdot y + 3\cdot z)$ , $x = r^{2}+t^{2}$ , $y = s^{2}-t^{2}$ and $z = r^{2}+s^{2}$ :

$\frac{dw}{dr} = \frac{\frac{dx}{dr}+2\cdot \frac{dy}{dr} +3\cdot \frac{dz}{dr} }{x+2\cdot y + 3\cdot z}$

$\frac{dx}{dr} = 2\cdot r$

$\frac{dy}{dr} = 0$

$\frac{dz}{dr} = 2\cdot r$

$\frac{dw}{dr} = \frac{8\cdot r}{(r^{2}+t^{2})+2\cdot (s^{2}-t^{2})+3\cdot (r^{2}+s^{2})}$

$\frac{dw}{dr} = \frac{8\cdot r}{4\cdot r^{2}-t^{2}+5\cdot s^{2}}$ (1)

$\frac{dw}{ds} = \frac{\frac{dx}{ds}+2\cdot \frac{dy}{ds} +3\cdot \frac{dz}{ds} }{x+2\cdot y + 3\cdot z}$

$\frac{dx}{ds} = 0$

$\frac{dy}{ds} = 2\cdot s$

$\frac{dz}{ds} = 2\cdot s$

$\frac{dw}{ds} = \frac{10\cdot s}{(r^{2}+t^{2})+2\cdot (s^{2}-t^{2})+3\cdot (r^{2}+s^{2})}$

$\frac{dw}{ds} = \frac{10\cdot s}{4\cdot r^{2}-t^{2}+5\cdot s^{2}}$ (2)

$\frac{dw}{dt} = \frac{\frac{dx}{dt}+2\cdot \frac{dy}{dt} +3\cdot \frac{dz}{dt} }{x+2\cdot y + 3\cdot z}$

$\frac{dx}{dt} = 2\cdot t$

$\frac{dy}{dt} = -2\cdot t$

$\frac{dz}{dt} = 0$

$\frac{dw}{dt} = -\frac{2\cdot t}{(r^{2}+t^{2})+2\cdot (s^{2}-t^{2})+3\cdot (r^{2}+s^{2})}$

$\frac{dw}{dt} = -\frac{2\cdot t}{4\cdot r^{2}-t^{2}+5\cdot s^{2}}$ (3)

7 0

2 years ago

The graph represents the parking fees at a mall parking lot.

qwelly [4]

Total cost of 1 hour of parking is $2.

Explanation:

Given graph represents parking fees at a mall parking lot.

x-axis represents the hour of parking.

y-axis represents the cost of parking.

In the coordinate (1, 2),

1 represents hour of parking and 2 represents cost of parking

Hence, the coordinate (1, 2) represents the total cost of 1 hour of parking is $2.

The image of the graph is attached below.

5 0

3 years ago

−8y ≥ 48

PilotLPTM [1.2K]

First divide both sides by -8. Remember when you divide by a negative for an inequality, you have to flip the inequality sign.

So the answer is:
y < or equal -6

6 0

3 years ago

Which pair of equations can be used to verify the rectangular form, z = a + bi, and the polar form of a complex number are equiv

erastova [34]

Answer:

D.) a = rcos(θ) and b = rsin(θ)

Step-by-step explanation:

Got it right on Edge

6 0

3 years ago