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2 years ago

I need help please...

Mathematics

1 answer:

inna [77]2 years ago

4 0

Im pretty sure it is D "It will not be spread out across the entire coordinate plane because in Step 4 and Step 5, Sharon selected incorrect scales on the axes"

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calculate the perimeter of a triangle that has an area of 2340 cm2, and an in-circle with radius of 18cm.

vovangra [49]

Half of the perimeter multiplied by the radius of the inscribed circle is formula to find the area of a triangle, by using this you can see that the perimeter is 260 because 2340 / 9 = 260.

3 0

3 years ago

Solve for x.

xenn [34]

Answer:

$a \: \: x = \frac{ -1 ± i\sqrt{139}}{14}$

Explanation:

Since this is unfactorable, use the Quadratic Formula:

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

Now, take the information and input it:

$-1 ± \frac{ \sqrt{1 - 4(7)(5)}}{2(7)} \\ \\ -1 ± \frac{ \sqrt{ -139}}{ 14} = \frac{-1 ± i\sqrt{139}}{14}$

I am joyous to assist you anytime.

5 0

3 years ago

The graph of y = -5x + 1

Colt1911 [192]

y = -5x + 1

[y = mx + b "m" is the slope, "b" is the y-intercept (the y value when x = 0)]

So your slope is -5, and your y-intercept is 1 or (0,1)

$Slope = \frac{rise}{run}$

Rise is the number of units you go up(+) or down(-).

Run is the number of units you go to the right.

Since your slope is -5 or $\frac{-5}{1}$ , you go down 5 units, and to the right 1 unit.

6 0

3 years ago

Determine if the two triangles are congruent. If they are, state how you know.

blondinia [14]

All are congruent. Congruent means identical in size or shape. the different markings on the two shapes show that they are congruent. I can’t fully see number 10 so I can’t say it that one is or not

3 0

2 years ago

Tickets to a school play are $4.50 for an adult and $3.00 for a student. If 300 tickets are sold and $1087.50 collected, how man

Kryger [21]

Answer:

<h2>125 tickets for an adult</h2><h2>and 175 tickets for a student</h2>

Step-by-step explanation:

$a-\text{number of the tickets for an adult}\\s-\text{number of the tickets for a student}\\\\(1)\qquad a+s=300\\(2)\qquad4.5a+3s=1087.5\\------------\\(1)\\a+s=300\qquad\text{subtstitute}\ s\ \text{from both sides}\\a=300-s\\\\\text{Put it to (2):}\\\\4.5(300-s)+3s=1087.5\qquad\text{use distributive property}\\\\(4.5)(300)+(4.5)(-s)+3s=1087.5\\\\1350-4.5s+3s=1087.5\qquad\text{subtract 1350 from both sides}\\\\-1.5s=-262.5\qquad\text{divide both sides by (-1.5)}\\\\\boxed{s=175}$

$\text{Put the value of}\ s\ \text{to (1):}\\\\a=300-175\\\\\boxed{a=125}$

3 0

2 years ago