Answer:
DDKEFD
Step-by-step explanation:
Answer:
17.2°
Explanations
To find angle A, use the cosine rule.
a^2 = b^2 + c^2 - 2 × a × c cos A
4^2 = 7^2 + 10^2 - 2 × 7 × 10 cos A
16 = 49+ 100 - 140 × cosA
16 = 149 - 140cosA
16- 149 = - 140cosA
-133 = - 140cosA
cosA = 133/140
cosA = 0.95
A = 17.2°
Answer:
25% or 30L
Step-by-step explanation:
100% is 120L, we know 75% is acid, we need the other 25% to make the 100%. 25% of 120 is 30, so 30 liters is pure acid
An integer is a whole number, in other words, a number that isn't a fraction or decimal.
0 + 0 + -2 + -2 + 2 + -2 = -4
-4 is an integer because it is not a fraction or decimal.
Best of Luck!
She can spend 7.50 dollars and have 4 left over
