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4 years ago

Work out the area of the triangle.

Mathematics

1 answer:

vichka [17]4 years ago

5 0

Answer:

62.8

Step-by-step explanation:

So, keep in mind that the area of a triangle is equivalent to: 1/2(b)(h) with b being your base and h being your height.

We have our base: 10, and our angle: 105. Now we need to find our height. You don't just have to look at a triangle the way that it's oriented in the problem. Rotate it so that 10cm is at the bottom, and it will be much easier.

From there, you can create a right triangle and draw a line from the top of the triangle straight to the base. Then, you have a right triangle, where you can solve the height, and then plug your answer into the area formula. Further steps are detailed in the picture.

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X^2 + 4x + 4 = 0<br>please help!! I missed class! show steps!

Stels [109]

Answer:

x= -2

Step-by-step explanation:

Step 1. In order to find the zeros of the function, we must factor it.

Step 2. To factor this, we have to find two numbers that multiply to 4 and add to 4 which is 2 ( 2*2=4 and 2+2=4)

step 3. 0=(x+2)(x+2)

Step 4 make (x+2) equal to zero and solve which gives us -2, so -2 =x.

7 0

3 years ago

Under a dilation of a scale factor 4 with the center at the origin, if A (3,5), what will be the coordinates of the point A'

cupoosta [38]

$A'=(3\cdot4,5\cdot4)\\
A'=(12,20)$

7 0

3 years ago

Find a point on the y-axis that is equidistant from the points (7, −7) and (1, 1).

jeka57 [31]

Hello :
<span>a point on the y-axis is : P( 0, y)
</span>PA = PB or PA² = PB².... A(7, -7) B(1,1)
(7-0)²+(-7-y)² = (1-0)² + (1-y)²
49+49+14y+y² = 1+1-2y+y²
16y = - 96
y= - 6

6 0

3 years ago

a local school raised 5687.50 for the terry fox foundation. Hua raised 0.8% of this total. how much money did Hua raise?

zlopas [31]

You multiply the $5687.50 by 0.8 to get the total of $4550.
So Hua raised $4550 out of the $5687.50.

6 0

3 years ago

A scientist mixes water (containing no salt) with a solution that contains 35% salt. She wants to obtain 105 ounces of a mixture

Naya [18.7K]

Answer:

60 oz of water to add

45 oz of 35% salt solution should be used

Step-by-step explanation:

Let x = amt no. ounces in the first solution

and 105 - x = amt no. of ounces in the second solution

Ist solution contains 0% salt

2nd solution contains .35(105 - x) salt

.15(105= amt of salt in mix

So.

amt of salt in 1st solution + amt of salt in 2nd solution = amt of salt in the mix

0 + .35(105 - x) = .15(105)

Let's get rid of the fractions by multipying thru the equation by 100

35(105 - x) = 15(105)

3675 - 35x = 1575

-35x = -2100

x = 60 oz of water to add

105 - 60 = 45 oz of 35% salt solution should be used

7 0

3 years ago