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pentagon [3]
2 years ago
14

Solve each equation

Mathematics
1 answer:
aliya0001 [1]2 years ago
5 0

Step-by-step explanation:

1.

0 =  {x}^{2}  - 7x - 18 \\ 0 =  {x}^{2}  + 2x - 9x - 18 \\ 0 = x(x + 2) - 9(x + 2) \\ 0 = (x + 2)(x - 9) \\  \\  \\ (x + 2) = 0 \:  \:  \:  \: or \:  \:  \:  \: (x - 9) = 0 \\  \\if  \:  \:x + 2 = 0 \\x = 0 - 2 \\ x =  (- 2) \\  \\ if \:  \:x - 9 = 0 \\ x = 0 + 9 \\ x = 9 \\

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Which number is greater and by how much? a decreased by 50% and then increased by 50% of the result
zaharov [31]

Answer:

Let's assume the number is 100 now it is increased by 50% that means

100+ (50/100)*100

100+50=150

Now it is decreased by 25% that means

150- (25/100)*150

150–37.5=112.5

Total percentage increase ={(112.5–100)/100}*100

=12.5%

Step-by-step explanation:

7 0
2 years ago
A bus covers a distance of 2.45 km in 2 min. What is the speed of bus?​
Vladimir [108]

Answer:

The speed of the bus is 74.242 kilometers per hour.

Step-by-step explanation:

Let suppose that bus runs at constant speed and that speed is measured in kilometers per hour. Then, the speed of the bus (v), in kiometers per hour, is determined by following kinematic expression:

v = \frac{s}{t} (1)

Where:

s - Travelled distance, in kilometers.

t - Time, in hours.

If we know that s = 2.45\,km and t = 0.033\,h, then the speed of the bus is:

v = \frac{s}{t}

v = 74.242\,\frac{km}{h}

The speed of the bus is 74.242 kilometers per hour.

7 0
3 years ago
Gotta go back to school today..
PIT_PIT [208]

Answer:

I  believe its 33.60 because if you add up 33.+5% that would give you 33.6 so its 33.60

Step-by-step explanation:

Hope its right

3 0
3 years ago
I WILL MARK BRAINLIEST PLEASE HELP !! Determine whether the two triangles are similar.
soldi70 [24.7K]

The two triangles are similar by SSA similarity. Option B is correct.

<h3>What is the triangle?</h3>

A triangle is a three-sided polygon. It is one of the most fundamental geometric forms.

If the ratio of the sides are same as well as the one angle is common between the two triangles then in that condition there will be SSA similarity.

From the triangle ABC and DEC

The ratio of the sides is;

\rm  \frac{10}{12}= \frac{8}{9.6} \\\\ \frac{5}{6}= \frac{5}{6}

One angle c is common in the two triangles.

The two triangles are similar by SSA similarity.

Hence, option B is correct.

To learn more about the triangle, refer to:

brainly.com/question/2773823

#SPJ1

3 0
2 years ago
56:12
Gre4nikov [31]

Answer:

The official answer is {C} ive previously taken the test

Step-by-step explanation:

I have taken the test before hand.

5 0
2 years ago
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