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gogolik [260]
4 years ago
13

Y= 2x - 5 Y= -8x - 15

Mathematics
1 answer:
irina [24]4 years ago
7 0
This is a simple substitution. I’ve attached a picture to explain the solving process:

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Haley's car gets at least 17 miles per gallon. If she plans a trip that is 250 miles, what is the minimum number of gallons she'
icang [17]
Divide 250 miles by 17 mpg:

250 miles
-------------- = 14.7 gallons (absolute mininum).  Go for 15 gallons.
  17 mpg
4 0
3 years ago
Read 2 more answers
*Will give brainliest* A ladder, leaning against a wall, makes an angle of 20° with the ground. The foot of the ladder is 3 m fr
Fantom [35]

Answer:

The answer is 3.64m

This is because if you draw a diagram, and label all the sides of the triangle (opp, hyp, adj), the adjacent angle is 3m. You can now use the sine rule to find the hypotenuse (length of ladder) by doing: cos 30= 3/h. You divide cos 30 by 3 and you get the answer of 3.64m rounding to 2 decimal places.

3 0
3 years ago
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The appliance store where the Scott family shops offers a 7% discount for paying cash. The Scott
Nostrana [21]

Answer:

7% = $34

100% =  100/7 X 34 = 3400/7 = $ 485.71  OR  $ 486  ANSWER.

Step-by-step explanation:

100% =  100/7 X 34 = 3400/7 = $ 485.71  OR  $ 486  ANSWER.

8 0
4 years ago
The tour costs £359 per person. You have to pay a deposit of £78 in advance. How much more do you need to pay
dimaraw [331]
The cost of the tour= £359.

The deposit is just an initial pay, which is a part payment of the total cost

If you pay a deposit of £78 out of £359, Then you need to subtract £78 from £359 to obtain,

359-78=281 pounds.

Therefore you need to pay £281 more.
4 0
3 years ago
a. Write and simplify the integral that gives the arc length of the following curve on the given integral. b If necessary, use t
WINSTONCH [101]

Answer:

\int\limits^{\pi/2} _0 (1+4cos^{2} (2x)dx

Step-by-step explanation:

Arc length is calculated by dividing the arcs in to small segments ds

By pythagoren theorem

ds^2=dx^2+dy^2

then integrate ds to get arc length.

We are given a function as

y = sin 2x in the interval  [0, pi/2]

To find arc length in the interval

Arc length s =\int\limits^{\pi/2} _0 {1+y'^2} \, dx \\=\int\limits^{\pi/2} _0 (1+4cos^{2} (2x) )dx

Hence arc length would be

B) \int\limits^{\pi/2} _0 (1+4cos^{2} (2x)dx

6 0
3 years ago
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