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3 years ago

The sum of 7 and x is -10

Mathematics

2 answers:

Phoenix [80]3 years ago

5 0

Answer:

The equation is 7 + x = -10

The answer to this equation is x = -17

Step-by-step explanation:

The way we find this answer is by subtracting 7 from both sides.

We do this because we want x by itself.

so -7 + (-10) is -17

The end result is -17.

SIZIF [17.4K]3 years ago

4 0

Answer:

7+x=-10

x=-17

7+(-17)= -10

Step-by-step explanation:

7+x=-10

subtract 7 from each side

x=-17

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The height, h, in feet of a rock above the ground is given by the equation h = -16t^2 + 24t + 16, where t is the time in seconds

boyakko [2]

The rock will hit the ground at 2 seconds.

Explanation:

Given that the height, h, in feet of a rock above the ground is given by the equation $h=-16t^2+24t+16$ , where t is the time in seconds after the rock is thrown.

We need to determine the time at which the rock will hit the ground.

To determine the time, let us equate the height h = 0 in the equation $h=-16t^2+24t+16$ , we get,

$0=-16t^2+24t+16$

Switch sides, we have,

$-16 t^{2}+24 t+16=0$

Let us solve the equation using the quadratic formula.

Thus, we have,

$t=\frac{-24 \pm \sqrt{24^{2}-4(-16) 16}}{2(-16)}$

Simplifying, we get,

$t=\frac{-24 \pm \sqrt{576+1024}}{-32}$

$t=\frac{-24 \pm \sqrt{1600}}{-32}$

$t=\frac{-24 \pm 40}{-32}$

Hence, the two values of t are

$t=\frac{-24 + 40}{-32}$ and $t=\frac{-24 -40}{-32}$

Simplifying the values, we get,

$t=\frac{16}{-32}$ and $t=\frac{-64}{-32}$

Dividing, we get,

$t=-\frac{1}{2}$ and $t=2$

Since, t cannot negative values, we have,

$t=2$

Thus, the rock will hit the ground at 2 seconds.

8 0

3 years ago

The radius of a circle is 19 km what is the circles area using 3.14 for pie

Sholpan [36]

Answer:

1133.54 or 361 pi

Step-by-step explanation:

19^2*pi

5 0

3 years ago

Read 2 more answers

g A trial jury of 6 people is selected from 20 people: 8 women and 12 men. What is the probability that the jury will have an od

cricket20 [7]

Answer: P(odd) = 0.499

Step-by-step explanation:

Given:

Total number of people = 20

Number of men = 12

Number of women = 8

Number of jury to be selected = 6

For the jury to have an odd number of women. it must have either of the three.

1. 1 woman , 5 men

2. 3 women, 3 men

3. 5 women, 1 man

The total possible ways of selecting the 6 people jury is;

N = 20C6 = 20!/6!(20-6)!

N = 38760

The possible ways of selecting;

Case 1 : 1 woman, 5 men

N1 = 8C1 × 12C5

N1 = 8 × 792 = 6336

Case 2 : 3 women , 3 men

N2 = 8C3 × 12C3

N2 = 12320

Case 3 : 5 women, 1 man

N3 = 8C5 × 12C1

N3 = 672

P(Odd) = (N1+N2+N3)/N

P(odd) = (6336+12320+672)/38760

P(odd) = 19328/38760

P(odd) = 0.499

6 0

3 years ago

Can some one answer quickly please

denis-greek [22]

Answer:

the answer is A -1/3 x

Step-by-step explanation:

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3 0

3 years ago

kyle received his paycheck in the mail today. however ,he thinks there is a mistake in the amount before taxes were taken out wa

11111nata11111 [884]

492.36-73.85=418.51

6 0

3 years ago

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