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juin [17]
2 years ago
15

Train A moves every 2 minutes, Train B moves

Mathematics
1 answer:
horrorfan [7]2 years ago
6 0

Answer:

in 84 minutes or 1 hr, 24 min

Step-by-step explanation:

you need to find the least common multiple of 2, 3 and 28 which is 84

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2 1/2 times (-3 3/4)
serious [3.7K]

Answer:

-9.375

Step-by-step explanation:

2 1/2 x (-3 3/4) = -9.375

3 0
3 years ago
Read 2 more answers
If x+a is a factor of 2x²+2ax+5x+10,find a.
vazorg [7]

If x+a is a factor of the polynomial, it means that -a is a root of the polynomial.

In fact, if a polynomial p(x) has a root x_0 (i.e. p(x_0)=0), then the polynomial is divisible by (x-x_0)

In your case, you know that the polynomial is divisible by (x+a)=(x-(-a)), so -a is a solution.

Let's evaluate p(-a) and set it to zero:

2(-a)^2+2a(-a)+5(-a)+10 = 0 \iff 2a^2-2a^2-5a+10=0 \iff -5a+10 = 0 \iff a = 2

We can check the answer: if a=2 the polynomial becomes

2x^2+2(2)x+5x+10 = 2x^2+9x+10

And we're claiming that -a=-2 is a root of this polynomial:

2(-2)^2+9(-2)+10 = 2\cdot 4 - 18 + 10 = 0

5 0
3 years ago
This sphere has a radius of 3 cm. What is the surface area of the sphere?
Oduvanchick [21]
Hope this helps! Mark brainly please!

5 0
3 years ago
Given: m || n<br><br> What is the value of x?
Hoochie [10]
6x-2=46;6x=48;x=8
Therefore, x is equal to 8
4 0
3 years ago
Read 2 more answers
WILL MARK BRAINLIEST!<br><br> Given: Parallelogram ABCD, calculate the length of AD
frez [133]
Your answer would be 20.6
5 0
2 years ago
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