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Sergio [31]
3 years ago
11

Question Number 12, i need help!! It’s geometry.

Mathematics
1 answer:
Anika [276]3 years ago
6 0
X = 13

( x + 4) / 51 = (2x - 7) / 57
585 = 45x
585/45 = 45x/45
x = 13
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Jacob leaves his summer cottage and drives home. After
krok68 [10]

Answer:

A linear relationship can be written as:

y = a*x + b

Where a is the slope and b is the y-intercept.

If this line passes through the points (a, b) and (c, d) then the slope can be written as:

a = (a - c)/(b - d)

Here y will represent the distance between Jacob and his house, and the variable x represents the time that he has ben driving.

In this case, we know that after driving for 5 hours, he is 112km from home.

Then we can write this point as (5h, 112km)

We also know that after 7 hours he is 15km from home.

Then we can write this point as (7h, 15km)

Then the slope of this function will be:

a = (15km - 112km)/(7h - 5h) = -48.5 km/h

Then the equation is:

y = -(48.5 km/h)*x + b

To find the value of b, we can replace the values of one of the points, for example in the point (7h, 15km)

This means that we need to replace x by 12h, and y by 15km, then we get:

15km = -( 48.5 km/h)*7h + b

15km + ( 48.5 km/h)*7h = b = 354.5 km

then the equation will be:

y = (-48.5 km/h)*x + 354.5 km

Now we want to answer: How long had Jacob been driving when he was 209 km from  home?

Then we need to only replace y by 209km, and solve for x:

209km = (-48.5 km/h)*x + 354.5 km

209km - 354.5 km = (-48.5 km/h)*x

-145.5km =  (-48.5 km/h)*x

-145.5km/( -48.5 km/h) = x = 3h

So he is 209km away from his home after driving for 3 hours.

6 0
3 years ago
Solve for X <br> 7x=49 (brainliest)
posledela

Answer:

\huge\colorbox{violet}{ᴀɴsᴡᴇʀ}

Hey There!

The answer = 7 = ( Seventh Track of TS8= Seven )

Step-by-step explanation:

7x = 49 \\ x = 49 \div 7 \\ x = 7

=>

7 \times 1 = 7 \\ 7 \times 2 = 14\\ 7 \times 3 = 21 \\ 7 \times 4 = 28 \\ 7 \times 5 = 35 \\ 7 \times 6 = 42 \\ \bold {7 \times 7 = 49} \\ 7 \times 8 = 56 \\ 7 \times 9 = 63 \\ 7 \times 10 = 7

6 0
3 years ago
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Find 19/25 of $25,000<br><br> A. $2,500<br> B.$15,000<br> C.$19,000<br> D.$1,900
Alla [95]
I am thinking A) Or B) because iPlease chose as best if i am wrong please don't be mad most of my stuff is correct
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Hey Adam hey asahi how y’all doing
dexar [7]

hllo dear

Have a wonderful day ahead

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PLEASE HELP MEE
Ket [755]

Answer:

( D )Each sandwich has 2 pounds of ham.

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