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3 years ago

I'm not sure if this is correct.

Mathematics

1 answer:

Wittaler [7]3 years ago

8 0

Hi the perimeter is right but I'm pretty sure the area should be 585.

Explanation:
Area for a triangle is 1/2 base x height

30x39
= 1,170

1,170 divide 2

=585

I hope this is helpful :)

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Can someone help me with this

Natali [406]

Answer:

Slope is defined as rise over run, which can be expressed as the difference of the y-coordinates divided by the difference of the x-coordinates. If we rise, we are moving vertically, or along the y-axis. If we run, we are moving horizontally, or along the x-axis.

The formula for the slope m of a line given two points (x1, y1) and (x2, y2) that lie on the line is:

m = (y2 - y1)/(x2 - x1)

m = (15 - 5)/(-6 - 4)

m= 10/-10

m = -1

Now, we can use the slope-intercept form of the equation of a line to obtain the equation of the line that satisfies the conditions outlined in the problem. Slope-intercept form is:

y = mx + b

Again, m represents the slope, while b stands for the y-intercept. We can use either point on the line to represent x and y. Let's choose the point (4, 5)

5 = -1(4) + b

5 = -4 + b

9 = b

The equation of the line is:

y = -x + 9

7 0

2 years ago

If f(x)=3x-2,find f(8)-f(-5)

Alexandra [31]

To find both f(8) and f(-5), we will need to plug in their values for x and solve for each. Then, we can subtract them to find the final answer.

Finding f(8):

f(8) = 3(8) - 2

f(8) = 24 - 2

f(8) = 22

Finding f(-5):

f(-5) = 3(-5) - 2

f(-5) = -15 - 2

f(-5) = -17

Subtracting f(8) and f(-5):

f(8) - f(-5)

22 - - 17

22 + 17

Hope this helps!! :)

6 0

3 years ago

If AD and BD are bisectors of CAB and CBA respectively. Find the sum of angles x and y.

olchik [2.2K]

The picture in the attached figure

step 1
we know that
It is given that AD and BD are bisectors of ∠CAB and ∠CBA respectively.
Therefore,
x = ∠CAB/2 -----> equation 1
y = ∠CBA/2 -----> equation 2

step 2
In triangle ABC,
∠CAB + ∠CBA + ∠ACB = 180° ----> [The sum of all three angles of a triangle is 180°]
∠CAB + ∠CBA + 110° = 180°
∠CAB + ∠CBA = 180° - 110°
∠CAB + ∠CBA = 70° ------> divide by 2 both sides
∠CAB/2 + ∠CBA/2 = 70/2 -------> equation 3
substitute equation 1 and equation 2 in equation 3
x+y=35

hence

the answer is
x+y =35°
⇒ x + y = 35° ...[From equation (1) and (2)]

5 0

3 years ago

Seven increased by the product of two numbers

k0ka [10]

Yu add the products of the two numbers by 7

4 0

2 years ago

A student is evaluating the expression below for n = 3.7

iVinArrow [24]

Given expression : 12.3 + 6 (n - 0.5)

Step 1 : substitute n = 3.7

12.3 + 6 (3.7 - 0.5)

Step 2 : Simplify the parenthesis

12.3 + 6 (3.2 )

Step 3 : Do the multiplication and open the parenthesis

12.3 + 19.2

Step 4 : Add the two number

12.3 + 19.2 = 31.5

So the answer of the given expression when n = 3.7 is 31.5

3 0

3 years ago

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