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3 years ago

PLS HELP ME ASAP FOR 3, 4, and 5 (SHOW WORK!!) + LOTS OF POINTS!

Mathematics

2 answers:

ValentinkaMS [17]3 years ago

6 0

Number 3 is a because for every hour (x) the train travels 50 miles (y) so the total distance will be 50 times the number of hours (50x)

Anvisha [2.4K]3 years ago

4 0

For number 3, the answer will be B because I use the formula of y/x which is 60/1, 120/2, 180/3, 240/4, and 300/5 which is y=60x. For number 4, I know that it will travel 60 miles per hour, so I just need to take 450 divided for 60 to get how long does it took to travel for 450 miles which equal 7.5 hours or 7 1/2 hours which is A. For number 5, I know that 6 3/4 hour will also equal to 6.75 hours. Now, I just need to take 60 times 6.75 to see how many miles does it took to travel for 6.75 hours which equal 405 miles which is C. Hope it help!

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Solve the inequality 42<-6d

pentagon [3]

Answer:

d < - 7

Step-by-step explanation:

given

42 < - 6d ( divide both sides by - 6 )

Remembering to reverse the inequality symbol as a consequence

- 7 > d ⇒ d < - 7

6 0

4 years ago

If one of the angle is 60 degree and the other two are in the ratio 1:2,<br> find the angles.

ololo11 [35]

Answer:

Let the two angles be x and 2x

Sum of angles of triangle=180°

60+x+2x=180

3x=180-60

x=120/3

x=40

2x=80

Step-by-step explanation:

40 and 80 are other two angles

3 0

3 years ago

Line AB has endpoints A(-4,5) and B(3,5). What is the x-coordinate of a point C such that B is the midpoint of line AC

Ipatiy [6.2K]

Easy peasy

the midpoint between $(x_1,y_1)$ and $(x_2,y_2)$ is
$(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$
just average them

so given that (3,5) is the midpoint of (-4,5) and (x,y)
$(\frac{-4+x}{2},\frac{5+y}{2})=(3,5)$
so by logic
$\frac{-4+x}{2}=3$ and $\frac{5+y}{2}=5$
times both sides by 2 for everybody
-4+x=6 and 5+y=10
add 4 to both sides for left one and minus 5 from both sides for right
x=10 and y=5

the coordinate of point C is (10,5)
the x coordinate is 10

7 0

4 years ago

Help me

Aliun [14]

Answer:

2 Real Roots

Step-by-step explanation:

The discriminant (D) is found using the formula b^2+4ac for the equation ax^2+bx+c.

If D>0 there are two real roots, D=0 one real root and D<0 no real roots.

D = b^2+4ac

D = 10^2+4(-4)(-8)

D = 100+32*4

D = 100+128

D = 228

since 228>0

There are 2 real roots

6 0

4 years ago

Which of the following is NOT a Pythagorean triangle?

Paladinen [302]

Answer:

Step-by-step explanation:

you have to be able to add two legs of the triangle and it equal more than your 3rd leg

6 0

3 years ago