5a – 7b + b2 <span>for a = –1 and b = 5.
5(-1) - 7(5) +5^2
= -5 - 35 + 25
= -40 + 25
= -15</span>
=-6x+54
1. Multiply the sides
2. Get what x equals which is 6
You answer would be 50/3 or 16 2/3. If you have learned about cross-multiplying, you would set it up as 5/3=x/10; then 5*10=3*x; You would get x alone, getting your answer. If you have NOT learned cross-multiplication, you divide 10 by 3, getting 3 1/3 or 10/3; then multiply by 5, getting your answer. I hope this helps!!!
Answer:
-2 1/6
Step-by-step explanation:
The measures of the angles are 30, 60 and 90 degrees.
Explanation:
I assume the question should read "the measures of the ANGLES of the triangle are in the ratio 2:4:6.
If the angles are in the proportion 2:4:6, the measures of the angles have the same scale factor
x
. And, the sum of the measures of the angles of a triangle is
180
.
⇒
2
x
+
4
x
+
6
x
=
180
12
x
=
180
12
x
12
=
180
12
x
=
15
The measures of the angles are:
2
x
=
2
(
15
)
=
30
4
x
=
4
(
15
)
=
60
6
x
=
6
(
15
)
=
90
