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soldier1979 [14.2K]
3 years ago
15

A car leaves city A, at a speed of 90 km / h. Three hours later another car leaves the same city in search of the first one with

a speed of 120 km / h. in which point do they meet?
Select the appropriate answer:
A) 120km
B) 30km
C) 1080km
D) 560 km

Please help! :(
Mathematics
1 answer:
ohaa [14]3 years ago
8 0

Answer:

C) 1080km

Step-by-step explanation:

Let t be the time after A leaves

Distance covered by A:

90t

Distance covered by B:

120(t - 3)

90t = 120(t - 3)

90t = 120t - 360

30t = 360

t = 12

Distance: 90(12) = 1080

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I NEEED HEEELLLPP
cricket20 [7]

Answer:

c) T(−1, 3) ° Rotation,180°

Step-by-step explanation:

<u><em>Explanation:</em></u><em>-</em>

<em>First we will apply transformation is </em>

<em>Rotation of 180°  then we will apply transformation is changes  </em>

<em>(x,y) to (-x ,-y)</em>

<em>a)</em>

<em>Given vertex T(  2 ,2 )</em>

<em>T( 2 ,2 )→ T( -2 ,-2)</em>

<em>Next we will apply rule </em>

<em>Horizontal translation left '1' units and Vertical translation up 'd' units</em>

<em>T( -2 ,-2) → T¹ ( -2 -1 ,-2 +3)</em>

<u><em>The new vertex is  T¹ ( -3 ,1)</em></u>

<em>b)</em>

<em>Given vertex U(  4 ,2 )</em>

<em>U( 4 ,2 )→ U( -4 ,-2)</em>

<em>Next we will apply rule </em>

<em>Horizontal translation left '1' units and Vertical translation up 'd' units</em>

<em>U -4 ,-2) → U¹ ( -4 -1 ,-2 +3)</em>

<u><em>The new vertex is  U¹ ( -5 ,1)</em></u>

<em>c) </em>

<em>Given vertex R(  3 ,5 )</em>

<em>R( 3 ,5 )→ R( -3,-5)</em>

<em>Next we will apply rule </em>

<em>Horizontal translation left '1' units and Vertical translation up 'd' units</em>

<em>R( -3 ,-5) → R¹ ( -3 -1 ,-5 +3)</em>

<u><em>The new vertex is  R¹ ( -4 ,-2)</em></u>

<em>d) </em>

<em>Given vertex S(  1 ,3 )</em>

<em>S( 1 ,3 )→ S( -1 ,-3)</em>

<em>Next we will apply rule </em>

<em>Horizontal translation left '1' units and Vertical translation up 'd' units</em>

<em>S( -1,-3) → S¹ ( -1 -1 ,-3 +3)</em>

<u><em>The new vertex is  S¹ ( -2,0)</em></u>

<u><em></em></u>

<em></em>

<em></em>

<em></em>

<em></em>

<em></em>

6 0
3 years ago
Darcy harvest 8 3/4 acres of corn every 5/6 of an hour. How many acres per hour?
otez555 [7]

Answer:

The answer is 10\frac{1}{2}\ per\ hour.

Step-by-step explanation:

Given:

Darcy harvest 8 3/4 acres of corn every 5/6 of an hour.

Now, to find the acres per hour it takes to harvest.

Darcy harvest = 8\frac{3}{4}=\frac{35}{4}\ acres.

The time he took to harvest = \frac{5}{6}\ hour.

So, to get the acres per hour we put formula:

Distance = \frac{35}{4}\ acres.

Time=\frac{5}{6}\ hour.

Speed=\frac{distance}{time}

Speed=\frac{\frac{35}{4}}{\frac{5}{6}}

Speed=\frac{35}{4}\times \frac{6}{5}

Speed=\frac{210}{20}

Speed=\frac{21}{2}

Speed=10\frac{1}{2}\ per\ hour.

Therefore, the answer is 10\frac{1}{2}\ per\ hour.

3 0
3 years ago
Sara bought 7 fish. Every month the number of fish she has doubles after m months she will have f fish, where f=7•2^m. How many
pav-90 [236]
After 2 months
f=7×2^2
f=28
3 0
3 years ago
Solve 11b^2-9=-68 using the square root method
Vladimir79 [104]

Answer:

b=i*\sqrt{\frac{59}{11} } or -i*\sqrt{\frac{59}{11} }

Step-by-step explanation:

11b^2-9=-68

11b^2=-59

b^2=-59/11

b=i*\sqrt{\frac{59}{11} } or -i*\sqrt{\frac{59}{11} }

"i" in this case is an imaginary number, equal to \sqrt{-1\\}

if you haven't learned about these yet, something is wrong with the question

3 0
3 years ago
Answers please! will make you brainliest!
LenKa [72]
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3 years ago
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