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irga5000 [103]
3 years ago
9

Please help asap. 55 points

Mathematics
2 answers:
telo118 [61]3 years ago
8 0
k^2+kf-2f^2
=k^2+kf-f^2-f^2
=k^2-f^2+kf-f^2
=(k+f)(k-f)+f(k-f)
=(k+2f)(k-f)
B
atroni [7]3 years ago
5 0
The answer would be B. Using the foil method to check, the two k's equal k^2, then the k and -f would equal -fk, plus the 2fk would equal a positive fk. Lastly, the 2f and -f would equal -2f^2.
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You hear that a storm is moving at 15 km/h north. You have been given the storm's _____.
Dovator [93]
According to the information given above, the answer is: You hear that a storm is moving at 15 km/h north. You have been given the storm's <span>velocity</span>. 
6 0
3 years ago
Fill in the blank.
Amiraneli [1.4K]

Answer: x ≈ 18 ft

Step-by-step explanation:

We will use our trig knowledge to solve this.

The man is standing 10 ft away, but we also need to add the 5 ft shadow as well as that is a point on our triangle.

We can set up a simple trig equation of: tan(50) = x/15

x being the height of the lamppost.

Now we solve.

tan(50) = 1.1918

1.1918 *15 = x

x = 17.876

Now round to the nearest foot.

x ≈ 18 ft

4 0
3 years ago
1-i need to mix 25% mineral spirits to the varnish i am using what ratio of spirit to varnish am i using? 2-if i use 240 ml of v
zhenek [66]

Answer:

(1) The required ratio of spirit to varnish is 1:3.

(2) You need 80 ml of mineral spirit.

(3) The ratio of tapestries' heights to width is 3:2.

Step-by-step explanation:

(1) If you need to mix 25% mineral spirit to the varnish, then the solution would contain 25% mineral spirit and 75% varnish.

So, \frac{spirit}{varnish}=\frac{25}{75}

                  =\frac{1}{3}

Thus, The required ratio of spirit to varnish is 1:3.

(2) If you use 240ml of varnish, then this quantity is 75% of the total solution or ration of varnish to the total solution will be 3:4.

Let x be the quantity of total solution.

Then, 240:x=3:4.

⇒\frac{240}{x}=\frac{3}{4}

⇒3x=240*4

⇒x=\frac{240*4}{3}

⇒x=320

That is, total solution is 320 ml.

Now, Spirit = Total solution - Varnish

⇒Spirit = 320ml-240ml

⇒Spirit = 80ml

Hence, if you use 240 ml of varnish, you need 80 ml of mineral spirit.

(3) Robison's tapestries all measure 1.5m long and 1m wide. First, we express dimensions in whole numbers by multiplying them by 10.

Then, dimensions are 15m long and 10m wide.

Now, Height : Width = 15:10

⇒\frac{Height}{Width} =\frac{15}{10}

⇒\frac{Height}{Width} =\frac{3}{2}

Hence, the ratio of tapestries' heights to width is 3:2.

8 0
3 years ago
What pair of numbers shows a common factor and a common multiple of 15 and 18?​
krok68 [10]

Answer:

3 is the GCF

Step-by-step explanation:

that is your answer

3 0
3 years ago
How to find the missing variable?
forsale [732]
50 + 3x = 7x + 12
This is because of the exterior angle theorem.
8 0
3 years ago
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