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Nataliya [291]
2 years ago
12

An old car has to travel a 2-mile route, uphill and down. Because it is so old, the car can climb the first mile, the ascent, no

faster than an average speed of 15 mi/h. How fast does the car have to travel the second mile, on the descent, to achieve an average speed of 30 mi/h for the trip
Mathematics
1 answer:
Molodets [167]2 years ago
3 0

Answer:

2s + 30 = 2s

Step-by-step explanation:

Time up hill + time down hill = total time

:

Multiply equation by 30s; results

2s + 30 = 2s

:

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Lin has a drawing with an area of 12 in2. If she increases all the sides by a scale factor of 5, what will the new area be?
Brut [27]
The anwer to ur question is 60 I’m pretty sure because u times the 12 by 5 and get 60
8 0
3 years ago
Select the correct graph of -4x + 3y = 6
artcher [175]
-4x + 3y = 6
-4x + 4x + 3y = 6 + 4x
<u>3y</u> =<u> 6 + 4x</u>
 3         3
y = 2 + 4/3x
-4x + 3(2 + 4/3x) = 6
-4x + 6 + 4x = 6
-4x + 4x + 6 = 6
0x + 6 = 6
<u>       -6  -6</u>
      <u>0x</u> = <u>0</u>
       0     0
        x = 0
-4(0) + 3y = 6
     0 + 3y = 6
   <u>+0          +0</u>
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            3     3
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3 0
3 years ago
Please help i will brainly Δdef and Δxyz are similar isosceles triangles.
aivan3 [116]

Answer:

Part 1) The ratio of the sides is 1.5

Part 2) see the explanation

Step-by-step explanation:

Part 1) we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent

If  Δdef and Δxyz are similar (given problem)

then

\frac{XY}{DE}=\frac{ZY}{FE}  

substitute the values

\frac{15}{10}=\frac{ZY}{6}

solve for FY

ZY=15(6)/10=9\ cm

When two figures are similar, then the ratio of its corresponding sides is proportional and this ratio is called the scale factor

In this problem

The scale factor is equal to

\frac{15}{10}=\frac{9}{6}=1.5

Part 2) How you could verify that these two triangles are indeed similar.

Remember that

In similar figures the corresponding angles are congruent

so

If

m∠D≅m∠X

m∠W≅m∠Y

m∠F≅m∠Z

then

Triangles are similar

7 0
4 years ago
Construct a right angled triangle XYZ with 90 at angle Y, YZ=7.5cm and XY =6cm​
jeyben [28]

Answer:

1 draw a line of 7.5 cm YZ by scale

2 construct the 90 degree with the help of protecter

3 then cut arc of 6 cm on 90 degree of angle & mark as X

4 join X and Z by scale

6 0
3 years ago
Pleaasse I really need help on this question
kolbaska11 [484]

Answer:

first of all wow this is not the easiest. But i figured out some of it i hope this helps! :)

Step-by-step explanation:

100 cm=1 m

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for the prism i know what is missing( .80) is missing for the side. I really hope this helps i am sorry i could not figure out the rest.

3 0
3 years ago
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