Answer:
the value of x is 12, and the value of y is 9
Answer:
y = -5
General Formulas and Concepts:
<u>Pre-Alg</u>
- Order of Operations: BPEMDAS
- Equality Properties
Step-by-step explanation:
<u>Step 1: Define equation</u>
-9 = 2(18) + 9y
<u>Step 2: Solve for </u><em><u>y</u></em>
- Multiply: -9 = 36 + 9y
- Subtract 36 on both sides: -45 = 9y
- Divide both sides by 9: -5 = y
- Rewrite: y = -5
<u>Step 3: Check</u>
<em>Plug in y to verify it's a solution.</em>
- Substitute: -9 = 2(18) + 9(-5)
- Multiply: -9 = 36 - 45
- Subtract: -9 = -9
Let x represent the number of $10 traveler's checks she has.
Let y represent the number of $20 traveler's checks she has.
Solve system of equations.
Answer:
1.6
Step-by-step explanation:
x\tan 70=4.4
xtan70=4.4
Cross multiply.
\frac{x\tan 70}{\tan 70}=\frac{4.4}{\tan 70}
tan70
xtan70
=
tan70
4.4
Divide each side by tan 70.
x=\frac{4.4}{\tan 70}=1.6015\approx 1.6\text{ feet}
x=
tan70
4.4
=1.6015≈1.6 feet