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2 years ago

Help me please i will give brainliest

Mathematics

1 answer:

AlekseyPX2 years ago

8 0

Answer:

Step-by-step explanation:

Number 13:

a+b=3+4

= 7

Number 14:

c-a= 12-3

= 9

Number 15:

a+b+c= 3+4+12

= 19

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How many solutions are there to 3x-10(x+2) =13-7x

Vaselesa [24]

This is the following way to solve this problem:

3x-10(x+2)=13-7x

3x-10x-20=13-7x (multiply 10 times what's in the parentheses)

-7x-20=13-7x ( subtract 3x from -10x)

-7x-20-13=-7x ( since the 13 is positive, when we move it to the other

side, we change it's sign, so now we subtract 13 from 20

-7x-7=-7x

-7=-7x+7x ( we do the same thing we did above, now with the -7x)

-7=x

x=-7

Answer: x = -7

--- --- --- --- --- --- ---

: )

8 0

2 years ago

When playing the lottery game Cash4Life, you must choose a cash ball number from 1 through 4. What is the probability that the r

Butoxors [25]

Answer:

$P(At\ least\ 2) = 0.75$

Step-by-step explanation:

Given

Balls = 1 to 4

Required

Determine the probability of selecting ball numbered at least 2

Here, we'll assume that all numbers have the same probability.

The probability of each ball will be:

$Probability = \frac{1}{4}$

So:

$P(At\ least\ 2) = P(2) + P(3) + P(4)$

Recall that

$Probability = \frac{1}{4}$ --- for each ball

So, the equation becomes

$P(At\ least\ 2) = \frac{1}{4} + \frac{1}{4} + \frac{1}{4}$

$P(At\ least\ 2) = \frac{3}{4}$

$P(At\ least\ 2) = 0.75$

7 0

2 years ago

Is her hair really that long... Possibly a brainly help me understand scientific notation better <3

Olenka [21]

Answer: 1 x 10^3

Step-by-step explanation:

6 0

2 years ago

The equation y 4.9t 2 3.5t 2.4 relates the height y in meters to the elapsed time t in seconds for a ball thrown downward at 3.5

tamaranim1 [39]

Answer:

$t \approx 0.43\,s$

Step-by-step explanation:

The vertical displacement function is $y(t) = -4.9\cdot t^{2}-3.5\cdot t + 2.4$ , where $y(t)$ is measured in meters and $t$ in seconds. Ball hits the ground when $y(t) = 0$ . That is:

$-4.9\cdot t^{2}-3.5\cdot t + 2.4 = 0$

Whose roots can be found by using the General Formula for Second-Order Polynomials:

$t_{1,2} = \frac{3.5\pm \sqrt{(-3.5)^{2}-4\cdot (-4.9)\cdot (2.4)} }{2\cdot (-4.9)}$

Solutions of this polynomial are:

$t_{1} \approx 0.43\,s,t_{2} \approx -1.14\,s$

Only the first root is physically consistent.

3 0

3 years ago

Please help i cant do it

Digiron [165]

Answer:

The first one is 59049. The second one is 32

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers