Answer:
43º
Step-by-step explanation:
complementary angles total 90
(2x - 13) + (4x - 5) = 90
Combine like terms
6x - 18 = 90
6x = 72
x = 12
ZB = 4x - 5
ZB = 4(12) - 5
ZB = 43º
Answer:
Answer to the 1st question is: 16/9 or 16:9 (whichever form you use)
Answer to the 2nd question is: 7/9 or 7:9
Step-by-step explanation:
<u>Key skills needed: Number theory, Ratios, and Fractions</u>
1) Let's look at the first question. A ratio is usually a number of something over a number of another thing. One such example is 5 apples : 4 oranges (or 5 apples/ 4 oranges - whichever form you write in).
- Based on that let's look at the first problem. We want to find the ratio of all the marbles in the bag to the blue marbles. So it would be --> the total # of marbles over the number of blue marbles.
- The total number of marbles is 7+9= 16. This would be our <u>first number, or the numerator. </u>
- The number of blue marbles is 9. This would be our <u>2nd number, or the denominator of the ratio.</u>
- With this information --> The ratio would be 16/9 or 16:9
2) Now let's look at the 2nd question. The number of red marbles to the number of blue marbles is the ratio we need to find.
- The number of red marbles is 7. This would be our first number or the numerator.
- The number of blue marbles is 9. This would be our second number or the denominator.
- Therefore, the ratio would be --> 7/9 or 7:9
<em>Hope you understood and have a nice day!! :D</em>
£36.48.
1. Multiply 38 by 0.04 (4% in decimal) and you’ll get 1.52
2. Subtract 1.52 from 38 to get 36.48
