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3 years ago

15

I need help with 6 and 7 please

1 answer:

ZanzabumX [31]3 years ago

7 0

Y=mx+b is the slope-intercept equation where m is the slope of a line and b is the y value of an x intercept. to solve for slope we have (y1-y2)/(x1-x2) where y1 and y2 are y values of 2 points, and x1 and x2 the x values of those points. so we have (0,5) and (3,4). These can be plugged in to get (5-4)/(0-3) or -1/3. then this is plugged in along with 5 for the x intercept to get y=-1/3*x+5 as the answer for 6. Completing the same process for the slope of #7 we can get (-12-(-2))/(0-8) or -10/-8 or 5/4. Again we plug in to get y=5/4*x-12 as the answer for 7.

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Someone, please help me with this question.

Viefleur [7K]

Answer:

C. 95°

Step-by-step explanation:

Sumplementary angles sum 180°

144° + a = 180°

a = 180° - 144°

a = 36°

121° + b = 180°

b = 180° - 121°

b = 59°

The sum of internal angles of a triangle is 180°

a + b + c = 180°

36° + 59° + c° = 180°

c° = 180° - (36°+59°)

c° = 180° - 95°

c° = 85°

then:

c + n = 180°

85° + n = 180°

n = 180° - 85°

n = 95°

5 0

3 years ago

Solve the equation to find where the treste ground levelEnter your answers from least to greatest and round to the nearest The m

DaniilM [7]

Answer:

The trestle meets ground level at 0.875 units and 9.125 units

Step-by-step explanation:

Poorly formatted question.

The given equation is:

$y = -x^2 + 10x - 8$

Required

The point where the trestle gets to the ground level

To do this, we set $y = 0$

So, we have:

$-x^2 + 10x - 8 = 0$

Multiply through by -1

$x^2 -10x + 8 = 0$

Solve using quadratic formula:

$x= \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

Where:

$a = 1; b =-10; c = 8$

So, we have:

$x= \frac{-(-10) \± \sqrt{(-10)^2 - 4*1*8}}{2*1}$

$x= \frac{-(-10) \± \sqrt{68}}{2*1}$

$x= \frac{-(-10) \± 8.25}{2}$

$x= \frac{10 \± 8.25}{2}$

Solve the fraction

$x= 5 \± 4.125$

Split

$x= 5 + 4.125\ or\ x= 5 - 4.125$

$x= 9.125\ or\ x= 0.875$

7 0

2 years ago

What is the mean of 87 104 and 99

sveticcg [70]

It is 96.6 repeating. to get this answer, you add up all the numbers then divide the answer by hiw many numbers there are

6 0

3 years ago

Read 2 more answers

True, false, or open 4y+8=6y+3

Soloha48 [4]

Answer:

its open you never know tho

Step-by-step explanation:

3 0

3 years ago

Write an equation to represent the number puzzle. Use x as the

Art [367]

Answer:

It is A

Step-by-step explanation:

Equation: 5x+1=9+3x

5x+1=9+3x

-1 -1

_________

5x=8+3x

-3x -3x

________

2x=8

__ __

2 2

<h2><u><em>x=4</em></u></h2>

5 0

3 years ago