Answer:
A
Step-by-step explanation:
4 units right is positive 4 on the x axis, 7 units down is negative 7 on the y axis
Answer:
21) 12 cm
22) 5.9 cm
Step-by-step explanation:
21) The base is 10, and if the other two sides are congruent and the perimeter is 36, we can figure out with simple algebra that the sides are 13 cm long.
Half of 10 is 5, so we can use the pythagorean theorem.
5^2+x^2=13^2
Rearranging the variables we have 169-25=x^2
144=x^2
x can be plus or minus 12, but since negative length is impossible we find that x is positive 12 cm.
22) We want to use sine, because we have opposite and hypotenuse. A simple and easy way to memorize this is the SohCahToa method. If we have opposite (O) and hypotenuse (H) we have OH. Soh has the letters O and H, and the S means we should use sine.
sine 36=a/10
Plug this into a calculator or desmos scientific calculator to get a=5.9
2/3 - 1/2x = -2/3 then the value of x is 6 .
The algebraic expression should often take one of the following forms: addition, subtraction, multiplication, or division. Bring the variable to the left and the remaining values to the right to determine the value of x. To determine the outcome, simplify the values.
The steps to use the calculator to determine x's value are as follows:
- Fill in the multiplicand and product fields with the numbers (Integer/Decimal Numbers).
- To obtain the result, press the "Solve" button now.
- The output field will show the dividend or the x value.
given equation is
2/3 - 1/2x = -2/3
⇒7/3-x/2 = -2/3
⇒7/3+ 2/3 =x/2
⇒9/3 = x/2
⇒ x=3 x 2
⇒ x=6
therefore the value of the x is 6
To know more about how to find x values visit :
brainly.com/question/21481562
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Answer:
36
Step-by-step explanation:
18 miles per hour so for 2 hours which is double, she should have traveled 36 miles.
Good Luck!
