Answer:
Step-by-step explanation:
1. 10² + 7² = x²
149 = x²
x = √149
2. x² + 19² = 21²
x² = 21² - 19² = 80
x = √80 = 4√5
3. x² + 16² = 27²
x² = 27² - 16² = 473
x = √473
4. 5.3² + 12.8² = x²
191.93 = x²
x = √191.93
5. 9² + 20² = x²
481 = x²
x = √481
6. 31 = x + 2√(19²-17²) = x + 2·6√2 = x + 12√2
x = 31 - 12√2
2x+8=20
2x=20-8
2x=12
12/2=x
6=x
Answer:
14.14
Step-by-step explanation:
You can find the value of x using the trig ratio Sine = opposite/hypotenuse.
The sin 45 = 10/x. Solve for x.
x= 10/ sin45
x = 10/0.707
x = 14.14
Answer: the slope is 0
Step-by-step explanation: hope it helps
Answer: there are 24 girls.
Step-by-step explanation:
Let x represent the number of boys in fifth grade at lenape elemantary school.
In fifth grade at lenape elemantary school,there are 4/7 as many girls as there are boys. This means that the number of girls in the school would be
4/7 × x = 4x/7
There are 66 students in fifth grade. This means that
x + 4x/7 = 66
Cross multiplying by 7, it becomes
7x + 4x = 462
11x = 462
x = 462/11
x = 42
The number of girls would be
66 - 42 = 24
