Ask question

Ask question

All categories

3 years ago

11

Danielle has her finals coming up and she's worried she'll fail her class. Her past 3 test grades were a 72. an 85, and a 68. Sh

e needs a 70 to pass the class. What grade does she need to make on the final to get a 70?

1 answer:

natka813 [3]3 years ago

7 0

Answer:

55

Step-by-step explanation:

You might be interested in

What is the value of this expression when a= - 3 and b=-2?<br> (3a^-2b^6/2a^-1b^5)^2

lisabon 2012 [21]

Answer:

so lets just rewrite it with A=-3 amd B=-2

(-9^4^-9^2^5)^2

which is equal to... 1!

Hope This Helps!!!

7 0

3 years ago

1 L of a 78% acid solution was mixed with 6 L of a 64% acid solution. Find the concentration of the new mixture.

JulijaS [17]

The first solution contributes 0.78*1 = 0.78 L of acid.

The second contributes 0.64*6 = 3.84 L of acid.

There will be 7 L total of the new solution, and 3.84 + 0.78 = 4.62 total L of acid in it. So the new solution has a concentration of 4.62/7 = 0.66, or about 66%.

8 0

3 years ago

A sealed rectangular container 10 inches by 12 inches by 6 inches is sitting on its largest face. If it is filled with water up

Sedaia [141]

Answer:

8 inches

Step-by-step explanation:

Given: Dimension of rectangular container= $(10\times12\times 6)\ inches$

Water is filled up to a level 2 inches from the top.

As given that container is sitting on its largest face, then it is standing on $(10\times 12)\ inches$

Which means the height of container is 6 inches and it ie filled with water up to 2 inches from the top.

∴ Height of water inside the container= $6-2= 4 \ inches$

Now, finding the volume of water inside.

we know, Volume= $length\times width\times height$

Volume= $10\times 12\times 4= 480\ inches^{3}$

Next, if container is placed in its smallest face then it is standing on $(10\times 6)\ inches$ and lets assume height to be "x"

Forming an equation now to express the volume conservation law.

⇒ $480\ inches^{3} = 10\times 6\times x$

⇒ $480= 60x$

dividing both side by 60

⇒ $x= \frac{480}{60}$

∴ x= 8 inches

Hence, 8 inches from the bottom will the water level reach if the container is placed on its smallest face

5 0

3 years ago

Write an equivalent expression for 2m+3m-1.

AnnyKZ [126]

Answer:

5m-1

Step-by-step explanation:

2m+3m-1

Combine like terms

5m -1

5 0

4 years ago

Given that cosθ = - and θ is in the second quadrant, find cscθ.

sdas [7]

Since sin²x+cos²x=1, we can plug (-12/13) for cos(x) to get (-12/13)²+sin²x=1
= 144/169+sin²x=1. Subtracting 144/169 from both sides, we get 25/169=sin²x. Square rooting both sides, we get 5/13 as sinx (since √25=5 and √169=13,as well as that it's in quadrant 2 - if it was in quadrant 3 or 4, it would be -5/13). Since cscx=1/sinx, we can plug (5/13) in for sinx to get 13/5 as our answer

5 0

3 years ago