3 is the correct answer give me brainliest have a nice day
Answer:
30
Step-by-step explanation:
The sum of all the angles in a triangle is always, always, 180 degrees.
Just add the angles, then solve for x.
(2x - 10) + (x + 30) + 70 = 180
3x + 20 + 70 = 180
3x + 90 = 180
3x = 90
x = 30
Answer:
31.25 in²
Step-by-step explanation:
Surface area of triangular pyramid
Perimeter, P = 4s = 4 * 2.5 = 10 inches
Lateral surface area = 0.5 * P * height = 0.5 * 10 * 5 = 25 inch²
The base area = s² = 2.5² = 6.25 inch²
Hence, surface are ao triangular pyramid ;
Lateral surface area + base area
= 25 inches + 6.25 inch²
= 31.25 in²
6r+7=13+7r
Move 7r to the other side. Sign changes from +7r to -7r.
6r-7r+7=13+7r-7r
6r-7r+7=13
-r+7=13
Move +r to the other side. Sign changes from +7 to -7.
-r+7-7=13-7
-r=6
Multiply by -1 to get positive and for 6
-r(-1)=6(-1)
r=-6
Answer: r=-6
Answer:
28
Step-by-step explanation:
the triangles are congruent, so we know that 2x + 10 = 3x + 1
using basic algebra we find that x is equal to 9
to find angle q, just plug the x value, 9, to 3x + 1, which gives us 3 × 9 + 1, or 28
Hope this helps! :)
