MATHEMATICS MIDDLE SCHOOL

Evaluate the expression when a=4, b=−5, and c=−8. (−b)+c=

Answers

Answer 1

Answer:

Answer:

-3

Step-by-step explanation:

(−b)+c=

Let b = -5 and c = -8

- (-5) + -8

5 -8

-3

Answer 2

Answer: The correct answer is -3. The 2 negative signs in the parentheses turns positive and add to -8.

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choose the equation below that represents the line that passes through the point (-2, -1) and has a slope of 5

Answers

point slope form y-y1=m(x-x1)

y-(-1) =5(x-(-2))

y+1 = 5(x+2)

to get it into slope intercept form

distribute

y+1 = 5x+10

subtract 1 from each side

y = 5x+9

Answer:

y = 5x + 9

Step-by-step explanation:

The equation of a line in its standard form can be written as:

y = mx + c

where y is the y coordinate,

m is the gradient of the line,

x is the x coordinate; and

c is the y intercept.

We will substitute the values of x and y coordinates and the slope to find the y intercept.

y = mx + c

-1 = (5) (-2) + c

c = 9

Therefore, the equation of the line which passes through the point (-2, -1) and has a slope of 5 will be y = 5x + 9.

If the complex number x = 3 + bi and |x|^2 = 13, which is a possible value of b? A. 2
B. 3
C. 9
D. 10

20 points to the brainliest user!!!!

Answers

If x=3+bi, then

$|x|=√(3^2+b^2).$

You know that $|x|^2=13,$ then

$\left(√(3^2+b^2)\right)^2=13,\n \n 9+b^2=13,\n \nb^2=4,\n \nb=\pm 2.$

Two possible complex numbers satisfy these conditions:

$x_1=3+2i, \ x_2=3-2i.$

As you can see the possible value of b is 2.

Answer: correct choice is A.

Standerd form example

Answers

3951 is an example of a standard form.

What standard form means is the number is written in numerical form.

More examples: 5269, 95862, 125634, etc.

rewrite y=1/2x+4
we know that standard form equations cannot contain fractions. therefore, let's first get rid of the fractions. we can multiply by the Least Common Denominator (LCD) to get rid of the fraction.
y=1/2x+4

2[y=1,2x+4] multiply all terms by 2.

2y=x+8 distribute the 2 to all terms.

-x+2y=x-x+8 subtract x form both sides in order to x and y on the same side of the equation.

-x+2y=8

-1[-x+2y=8] multiply all terms by -1 to make the lead coefficient positive.

x-2y=-8 the equation written in standard form.

You have been asked to build a scale model of your school out of toothpicks imagine your school is 30 feet tall Your scale is 1 ft: 1.26 cm

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The height of your school's scale model would be 37.8 cm tall. You would just have to multiply 1.26 by 30, because your school is 30 ft tall.

I know that 300÷30=10 because the 3 in 300 represents what times what it represents in what.

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3 in 300 represents 3 times 100. it represents 300

3 represents the 3 times in 100

Number 11!! I don’t understand it!! Can someone help please?? Thank you

Answers

Answer:

Step-by-step explanation:

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