Answer:
Son = 7 yrs old
Dad = 35 yrs old
Step-by-step explanation:
The image explains how to set it up. Its basic algebra after that.
Answer:
Step-by-step explanation:
answer
6. 1/2k-2
Answer:
Step-by-step explanation:
Given the modulus of a complex number |z1| = 6 and its argument θ1 = 70°
If z1 = a+bi, according to definition;
|z1| = √a²+b²
|z1|² = a²+b²
Since |z1| = 6, |z1|² = 6² = 36
a²+b² = 36 .......... 1
Also the argument is derived from the expression
tan θ = b/a
tan 70 = b/a
b/a = 2.75
b = 2.75a ........ 2
Substitute equation 2 into 1
a²+b² = 36
a²+(2.75a)² = 36
a²+7.5625a² = 36
8.5625a² = 36
a² = 36/8.5625
a² = 4.204379
a = √4.204379
a = 2.051 (to nearest thousandth)
Since b = b = 2.75a
b = 2.75(2.051)
b = 5.639 (to nearest thousandth)
z1 = 2.051+5.639i
Answer:
none of these
Step-by-step explanation:
2x² + 7x + 4
Factor
We cannot factor this since 2*4 +1 = 9 and we want 7
and 2*2 +2 = 6 and we want 7
and 2*1 +4 = 6 and we want 7
Answer:
2
Step-by-step explanation:
1 day = 24 hours
depth = 6- 1/6 * 24 = 6-4=2
