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3 years ago

If x=2 and y=5, evaluate the following expression: 2(x+y)

Mathematics

2 answers:

astraxan [27]3 years ago

6 0

Answer:

2(x+y)

x=2 and y=5

2x+2y

Subs

2(2)+2(5)

4+10=14

elixir [45]3 years ago

5 0

Answer:

Step-by-step explanation:

2(x+y)

2(2+5) (keeping 2 in place of x and 5 in place of y)

2(7)

2*7

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Most cars get their best gas mileage when traveling at a relatively slow speed. The gas mileage M for a certain new car is model

NeTakaya

In this item, it is assumed that we are to determine the speed at which the car will have the best gas mileage. This can be done by deriving the equation and equating it to zero.

M(s) = -1/28s² + 3s - 31

Deriving,
dM(s) = (-1/28)(2s) + 3 = 0

s = 42

Hence, the speed at which the best mileage is achieved is mi/h.

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3 years ago

If a triangle has lengths of 3ft and 54ft, what are all the possible lengths for the third side?

aleksandrvk [35]

Answer:

53, 55

Step-by-step explanation:

by the triangular inequality theorem, in a triangle.. sum of two sides is always greater than the third side.

3+54=57 ... exclude 57 and 58

3+51=54 ... exclude 51

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3 years ago

I=$54, P=$900, t=18 months what the asnwer

solniwko [45]

Assume simple interest.
I=Pin
=>
54=900*i*(18/12)
=>
i=54/900*12/18
=0.04
=4%

Annual simple interest rate is 4%

4 0

4 years ago

Translate "the quotient of 5 and a" into an algebraic expression.

mash [69]

I need 5 more points to ask a q please <33

4 0

3 years ago

Which angles are complementary to each other?

Oksi-84 [34.3K]

Answer:

All apply

Step-by-step explanation:

Complementary angles are ones that total 90°. Here, we have two pairs of congruent angles such that each pair totals 90°. We can mix and match to find pairs of complementary angles.

less than 45°: BGC and EGF

more than 45°: AGB and DGE

A complementary pair will consist of one angle from the first list and one angle from the second list. There are 4 possible pairings, and all are shown as answer choices.

All of the choices apply.

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2 years ago