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3 years ago

Please help meeeeeeeeee

Mathematics

1 answer:

daser333 [38]3 years ago

7 0

answers are shown below.

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A quadratic equation is shown: x2 + 18x + 76 = 0 Which of the following is the first correct step to write the above equation in

tia_tia [17]

Answer:

x^2 + 18x + 76 + 5 = 0 + 5

Step-by-step explanation:

The first step is to determine the constant that is needed to be able to write the expression in the desired form. That constant is the square of half the x-term coefficient: (18/2)^2 = 9^2 = 81.

The constant that is present is 76, which is 5 fewer than the needed constant, so the "first step" is to add 5 to both sides of the equation:

x^2 + 18x + 76 + 5 = 0 + 5

Then the next step would be to write the left side as a square:

(x +9)^2 = 5 . . . . . . . p = -9; q= 5

4 0

3 years ago

PLZ HELP MEE!!!<br> NO LINKS OR WEBSITES!!! YOU WILL GET REPORTED!!!

Mama L [17]

Answer:

$90 in^{2}$

Step-by-step explanation:

Base is an equilateral triangle

slant hight= 12 in

side of base= 5 in

so, perimeter of base = 3(5)=15 in

lateral area = 1/2 pl =1/2 (15)(12) in

=90 in²

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hope it helps..

have a great day!!

3 0

3 years ago

Read 2 more answers

Help me solve this I wil give brainliest and 40 points

Verizon [17]

Answer:

Slope: $-\dfrac{1}{2}$

Equation: $y=-\dfrac{1}{2}x+8$

Step-by-step explanation:

The line of the best fit passes through the points (0,8) and (4,6).

If the line passes through the points $(x_1,y_1)$ and $(x_2,y_2)$ then the slope of the line is

$\dfrac{y_2-y_1}{x_2-x_1}$

Hence, the slope of the line of the best fit is

$\dfrac{6-8}{4-0}=\dfrac{-2}{4}=-\dfrac{1}{2}$

The equation of the line is

$y=mx+b,$

where m is the slope and b is y-intercept, so the equation of the line of the best fit is

$y=-\dfrac{1}{2}x+8$

4 0

3 years ago

Y=2x y=0.50x+18 solve by substitution

prohojiy [21]

Answer:

y = 18 + 0.50x

Step-by-step explanation:

I think that is the answer.

6 0

2 years ago

Simplify. 2^5−4⋅3^3<br> 7+(1+100√)

frez [133]

$\\ \sf\bull\longmapsto 2^5-4(3^3)$

$\\ \sf\bull\longmapsto 32-4(27)$

$\\ \sf\bull\longmapsto 32-108$

$\\ \sf\bull\longmapsto -76$

7 0

2 years ago

Please help meeeeeeeeee ​

Please help meeeeeeeeee