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Simora [160]
4 years ago
12

(7t-2)-(-3t+1)=-3(1-3t)

Mathematics
1 answer:
Aleksandr-060686 [28]4 years ago
5 0
First you need to multiple minus in second bracket, also in other side you need to multiple - 3 in bracket

7t - 2 + 3t - 1 =  - 3 + 9t \\  \\ 10t - 3 =  - 3 + 9t \\ 10t - 9t =  - 3 + 3 \\ t = 0
Final answer is 0
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I need help with this
Harman [31]

By finding the proportional relation, we can get the complete table:

time (hours)    rain (inches)

1.43                               1

1                                0.7

5                               3.5

9.5                              6.56

x                                0.7*x

<h3></h3><h3>How to complete the given table?</h3>

Here we need to complete the table:

time (hours)    rain (inches)

a                               1

1                                b

5                               3.5

9.5                              c

x                                d

We know that the rain and the time must meet a proportional relationship, so if y is the rain in inches and x is the time in hours, the relation is:

y = k*x

Where k is the constant of proportionality.

We know that after 5 hours, 3.5 inches of rain have fallen, then we can replace that in the above formula:

3.5  = k*5

3.5/5  = k

0.7= k

Then the proportional relation is:

y = (0.7)*x

Now let's complete the table. On the first pair we have:

x = a, y = 1

Replacing that in the proportional relation we can find the value of a.

1 = 0.7*a

1/0.7 = a = 1.43

For the next pair, we have x = 1, y = b

b = 0.7*1 = 0.7

the next pair is x = 9.5, y = c

c = 0.7*9.5 = 6.65

The last pair is just the prooortional relationship:

d = y = 0.7*x

Then the complete table is:

time (hours)    rain (inches)

1.43                               1

1                                0.7

5                               3.5

9.5                              6.56

x                                0.7*x

If you want to learn more about proportional relationships:

brainly.com/question/12242745

#SPJ1

8 0
2 years ago
Store A Sells a set for $26 and offers a 15% discount
artcher [175]

Answer:

Step-by-step explanation:

20% of $1200 is $240

(0.2∗1200)=$240

Now subtract that number from 1200

1200−240=$960

try this example

3 0
3 years ago
Read 2 more answers
An expression is shown:
Artist 52 [7]

Answer:

210 so C.

Step-by-step explanation:

Hope this helps :)

4 0
3 years ago
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What is the area of this figure? Enter your answer in the box.​
GaryK [48]

Answer:

add area of p' gram and ️.

(20 x 16) + ( .5 x 20 x 8)

7 0
3 years ago
For a map a scale of 2 inches to 70 miles is used. If the distance on the map measures 1.8 inches what is the actual distance
asambeis [7]

Answer:

63 miles

Step-by-step explanation:

2/70 = 1.8/x                           Cross multiply

2x = 70 * 1.8                          Combine

2x = 126                                Divide by 2

x = 126/2

x = 63

The actual distance is 63 miles.

3 0
3 years ago
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