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3 years ago

(-3x +11x-1)+(7x2 - 4x+4)

Mathematics

2 answers:

tensa zangetsu [6.8K]3 years ago

5 0

Answer:

I think the answer might be 4x + 9

Step-by-step explanation:

Solve first bracket

( 8x - 1 ) + ( 10 - 4x )

Take away the brackets.

8x - 1 + 10 - 4x

Minus and add like terms

8x - 4x and -1 + 10

4x + 9

Hopefully that helps:)

Bumek [7]3 years ago

4 0

Step-by-step explanation:

-3x + 11x - 1 + 7x2 - 4x + 4

Solving like terms

7x2 + 4x + 3

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There are 12 blue marbles and 8 red marbles. find the probability of selecting one item

Diano4ka-milaya [45]

Answer:

selecting one item? If you mean each color:

40% chance for a red marble / 2/5 chance

60% chance for a blue marble / 3/5 chance

Step-by-step explanation:

Because there are 12 blue marbles and 8 red marbles, we would total them to see how many marbles there are in total. There are 20 in total, but to find the probability, if we put all 20 marbles in a bag (blue and red), and we picked a marble at random, there are 8 red marbles and 12 blue marble in that bag. The probability that I will choose red marbles is 8/20 (or 8 red marbles out of 20 total marbles), and for blue marbles, it would be 12/20 (or 12 blue marbles out of 20 total marbles). Simplify both expression to 2/5, and 3/5 respectively. Finally, if you need percentage, just multiply the denominator by 5 to get it to a hundred, and do the same to the numerator. This way you don't change the value of the expression.

8 0

3 years ago

Number 14 please help 10 points no links pleAse

marshall27 [118]

Answer:

Step-by-step explanation:

5 0

3 years ago

Equation with a slope of -2 and point of (4,7)

s344n2d4d5 [400]

Answer:

y=-2x+15

Step-by-step explanation:

So first we can write it in point slope form.

That is y-y1=m(x-x1)

y1 is the y coordinate

m is the lope

x1 is the x coordinate

This means that the equation is:

y-7=-2(x-4)

We can then convert it to slope intercept form which is

y=mx+b

y-7=-2x+8

y=-2x+15

3 0

3 years ago

Read 2 more answers

What are the X and Y intercepts of y= -2(x-4)2 +3

kari74 [83]

Answer: x-intercepts are ( 2.775,0) and (5.225,0)

And y-intercept is (0,-29)

Step-by-step explanation:

Here the given equation is,

$y = -2(x-4)^2+3$

For x-intercept, y = 0,

Put y = 0 in the above equation of parabola,

We get, $-2(x-4)^2 + 3 = 0$

$-2(x^2+16+8x) + 3 = 0$

$-2x^2-32-16x + 3 = 0$

$-2x^2-16x -29 = 0$

By solving this equation,

We get, x = 2.775 or x = 5.225

Therefore, x-intercept of the given parabola are (2.775, 0) and (5.225,0)

Now, for y-intercept, x = 0

By putting x = 0 in the given equation of parabola,

We get, y = -29

Thus, y-intercept of the given parabola = (0,-29)

4 0

3 years ago

Two straight lengths of wire are placed on the ground, forming vertical angles. If the measure of one of the angles formed is 72

lord [1]

One of the other angles is 72. Vertically opposite angles are equal.

Two angles that are side by side on this arrangement are supplementary.

That means they are to 180

x + 72 = 180

x = 180 - 72

x = 108

Answer

the for angles are

72 + 72 + 108 + 108

5 0

3 years ago