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3 years ago

What is the coefficient of the variable in the expression for 6 − 4x − 8 + 2?

Mathematics

2 answers:

marta [7]3 years ago

8 0

The coefficient is what the bariable is multiplied by. In this case, the variable is x and it is multiplied by 4

Lelu [443]3 years ago

4 0

A coefficient is the number part of a term. A term is made up of a number part and one or more variables raised to a power.

The only term is that has a variable is -4x. And it's coefficient is -4.

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A train covers 165 km in 1.5 hours. How far will the train travel in 2.2 hours if it maintains the same speed?

GaryK [48]

Answer:

242 km

Step-by-step explanation:

distance = rate x time

so 165 km in 1.5 he is the same as 110 km per hour.

d = 110(2.2).

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2 years ago

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Beth buys 5 gallons of tea for a party. If each serving is 1 cup how kany servings will there be at the party

Bumek [7]

Answer:

80, because there a 16 cups in one gallon and 5 gallons

Step-by-step explanation:

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3 years ago

There are two twins. One twin wants to explore the planet near Proxima Centauri and leaves on a spaceship traveling at 90% of th

miskamm [114]

Answer:

<em>4.7 years</em>

Step-by-step explanation:

Distance of planet from Earth = 1.3 parsec

We know that 1 parsec = 3.26 light years

And a light year is the distance traveled by light in time period of 1 year.

So, Distance of planet from Earth = 1.3 $\times$ 3.26 = 4.24 light years

Given that, the person travels at a speed equal to 90% of the light speed.

To travel to the planet from Earth, Light takes 4.24 years.

To travel the distance $D$ , at a speed $s$ light takes time of 4.24 years.

To travel the distance $D$ , at a speed $0.90s$ , the person takes time:

$\dfrac{4.24}{0.90} = \bold{4.7\ years}$

So, the twin on Earth ages by <em>4.7 years.</em>

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3 years ago

At 2:00 p.m. two cars start toward each other from towns 240 miles apart. If the rate of one car is 10 mph faster than the other

Juli2301 [7.4K]

Let’s call the speed of the slower car S, then the speed of the other is S+10mph.
At 5pm they have been travelling for 3 hours. The slower car travels a distance 3S and the faster one 3(S+10).
But the two distances must add up to 240 miles so 3S+3(S+10)=240, 3S+3S+30=240, 6S=210, S=35 mph. The faster car’s speed is 45mph. We can see that 3S is the same distance as 3x, so x=S=35 mph, and the distance the faster car travels is 3×45=135 miles.

5 0

3 years ago

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Angle G is a circumscribed angle of circle E. Major arc FD measures 280°.

mixer [17]

Answer:

The answer is 40°

Step-by-step explanation:

Solution

Now,

The Measure of major arc FD = 280°

Thus,

One complete angle measure 360°

Then

m∠FED = 360 - 180

m∠FED = 80°

Thus,

FE = DE ( the same circle Radius)

∠EFD = ∠EDF ( opposite angles to equal sides are equal)

Now

Applying angle sum property of a triangle in ΔEFD

∠EFD + ∠EDF + ∠FED = 180°

∠EFD + ∠EFD + 80 = 180

2∠EFD = 100

∠EFD = 50°

Hence, GF is tangent to the circle and the tangent always make right angles with the radius of the circle.

∠EFG = 90°

∠GFD + ∠EFD = 90°

∠GFD + 50 = 90

∠GFD = 40°

Therefore, The measure of the angle GFD is 40°

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3 years ago

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