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3 years ago

Multiply. (x + 7)(3x - 2) ( please answer with A. B. C. D.

Mathematics

2 answers:

coldgirl [10]3 years ago

8 0

Answer:

Step-by-step explanation:

The correct answer is A.

To solve the problem, you use the box method

mr_godi [17]3 years ago

5 0

Answer:

A. 3x^2+19x-14

Step-by-step explanation:

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Graph the line 2x + y = 7.

OLga [1]

Answer:f

Step-by-step explanation:

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3 years ago

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It takes 5 cooks 5 hours to bake 5 pies. Assuming no change of rate, how many

TEA [102]

Answer: It would take 10 cooks 10 hours to bake 10 pies.

Step-by-step explanation:

Each cook takes an hour to cook a pie, therefore:

It would take 10 cooks 10 hours to bake 10 pies.

I hope this helps!

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3 years ago

A survey asked a group of students to choose their favorite type of refreshment from the choices of ice cream, soda, and popsicl

makkiz [27]

There were 70 people who took the survey. 210 / 70 = 3. So, whatever 40 - 10 is, if we multiply by three, we get the answer. 40 - 10 = 30. 30 x 3 = 90. Simple as that. Hope I could help!
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4 years ago

Jack broke up 5×216 as (5x200)+(5x16) to multiply mentally.What strategy did jack use.

Marizza181 [45]

The strategy is called expanding notation because you are expanding that problem into small equations :)

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3 years ago

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Find anequation for the perpendicular bisector of the line segment whose endpoints are(3, -1) and (-9,5).

Mariulka [41]

The perpendicular bisector goes through the midpoint.

What is the midpoint of the 2 points?

We simply add up the x points and divide by 2. Then we add up the y points and divide by 2.

So,

Midpoint is:

$(\frac{3-9}{2},\frac{-1+5}{2})=(-3,2)$

Also, the perpendicular bisector's slope is the negative reciprocal of the line's slope.

The slope of the line is change in y points divided by change in x points.

Slope =

$\frac{5--1}{-9-3}=\frac{5+1}{-12}=\frac{6}{-12}=-\frac{1}{2}$

The slope (m) of the perpendicular line (negative reciprocal) is basically:

$2$

Equation of line is:

$y-y_1=m(x-x_1)$

m is the slope (what we got "2")

x1 and y1 are the respective point where it passes through (which is the midpoint, which is (-3,2)

So, equation of perpendicular bisector is:

$\begin{gathered} y-y_1=m(x-x_1) \\ y-2=2(x+3) \\ y=2x+6+2 \\ y=2x+8 \end{gathered}$

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1 year ago