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3 years ago

What is the solution to 3-(x+1)= 5x+6-7x?

Mathematics

2 answers:

UNO [17]3 years ago

8 0

4 sorry I don’t know how to explain it. :(

devlian [24]3 years ago

3 0

The answer is 4. 3 -1 then distribute to 2x +2 = 5x+6-7x. Combined to 2x+2 = 6 - 2x. Then 2-6, next -2x+2x Which equals 4 = x. At least I think this it is.

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Square root of 8 times square root of 32

fredd [130]

in decimal form it is 45.2

in exact form it is 32 squareroot 2

5 0

3 years ago

The 7th grade class participated in the following

marysya [2.9K]

Answer:

20 students

Step-by-step explanation:

Weight lifting:

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5 0

3 years ago

You are jumping off the 12 foot diving board at the municipal pool. You bounce up at 6 feet per second and drop to the water you

NARA [144]

Answer:

When do you hit the water?

1.075 seconds after you jump.

What is your maximum height?

the maximum height is 12.5626 ft

Step-by-step explanation:

The equation:

h(t) = -16*t^2 + 6*t + 12

Is the height as a function of time.

We know that the initial height is the height when t = 0s

h(0s) = 12

and we know that the diving board is 12 foot tall.

Then the zero in h(t)

h(t) = 0

Represents the surface of the water.

When do you hit the water?

Here we just need to find the value of t such that:

h(t) = 0 = -16*t^2 + 6*t + 12

Using the Bhaskara's formula, we get:

$t = \frac{-6 \pm \sqrt{6^2 - 4*(-16)*12} }{2*(-16)} = \frac{-6 \pm 28.4}{-32}$

Then we have two solutions, and we only care for the positive solution (because the negative time happens before the jump, so that solution can be discarded)

The positive solution is:

t = (-6 - 28.4)/-32 = 1.075

So you hit the water 1.075 seconds after you jump.

What is your maximum height?

The height equation is a quadratic equation with a negative leading coefficient, then the maximum of this parabola is at the vertex.

We know that the vertex of a general quadratic:

a*x^2 + b*x + c

is at

x = -b/2a

Then in the case of our equation:

h(t) = -16*t^2 + 6*t + 12

The vertex is at:

t = -6/(2*-16) = 6/32 = 0.1875

Evaluating the height equation in that time will give us the maximum height, which is:

h(0.1875) = -16*(0.1875 )^2 + 6*(0.1875) + 12 = 12.5626

And the height is in feet, then the maximum height is 12.5626 ft

6 0

3 years ago

Which equation would demonstrate the commutative property?

kompoz [17]

Answer:

b. 37 • 26 = 26 • 37

:)))))))))))))))))))

7 0

3 years ago

PLEASEEEE HELPPP MEEEE! NOWWWWW

umka2103 [35]

Answer:

The answer is -3

Step-by-step explanation:

First of all we find the difference -4-2 = -(4+2) and than we add the numbers answer is -6 .

$- \frac{6}{4 \div 2}$

4÷2=

$- \frac{6}{2}$

And than we simplify this fraction to 2 and find the answer -3. I would be glad if you choose my answer the best. Good lessons ♡

7 0

2 years ago