Substitute the value of the variable into the equation and simplify.
There for your answer is 10
Answer:
sorry i need points :(
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Step-by-step explanation:
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a. The total span of both bridges is 4.133 km.
When calculating the total of two different numbers, addition is the correct math operation to be used. We know that we need to add the length of the bridges together because the word <em>span</em> is the same as length. Also, the question asks about both bridges and uses the word <em>total. </em>2.063 + 2.07 = 4.133 km.
b. Leah and her dog will walk 4.126 km.
The question says that Leah walks across and back. This means she goes over the bridge two times. Times indicates that we should use multiplication for our math operation. Since she does the length two times, we need to multiply the length of the Walkway Over the Hudson bridge times 2. The math equation is 2.063 x 2 = 4.126 km.
<h3>Further Explanation</h3>
Addition
Addition is the math operation used to determine the total of a set of different numbers. Total means how many altogether.
Multiplication
Multiplication is the math operation used when finding the total when a number occurs multiple times.
Division
Division is used when breaking a number into an equal number of groups.
Subtraction
Subtraction is used when trying to find the difference between numbers
<h3>Answer Details</h3>
Subject: Math
Level: Middle School
Topic: Word Problems
<h3>Keywords</h3>
multiplication, division, addition, subtraction
<h3>Learn More</h3>
What is multiplication?: brainly.com/question/1135170
What are the properties of addition?: brainly.com/question/11036741
Answer:
108 student tickets, and 176 adult tickets were sold
Step-by-step explanation:
Adult ticket $8 Call the number of adult tickets sold "a"
Student ticket $5 Call the number of student tickets sold "s"
Since we are talking about TWO consecutive days of sold out seats, the total number of seats sold were 2* 142 = 284
Then we create two different equations with the information given:
a + s = 284
8 * a + 5 * s = 1948
we can solve for s in the first equation as follows: s = 284 - a
and use it in the second equation
8 a + 5 (284 - a) = 1948
8 a + 1420 - 5 a = 1948
combining
3 a = 528
a = 528/3
a = 176
we find the number of student tickets using this answer in the substitution equation we used:
s - 284 - 176 = 108
Therefore 108 student tickets, and 176 adult tickets were sold.
Answer:
The right statement is sin(J) = cos(L) ⇒ answer D
Step-by-step explanation:
* Lets describe the figure
- LKJ is a right triangle, where K is a right angle
∵ m∠K = 90°
∵ LJ is opposite to angle K
∴ LJ is the hypotenuse
∵ LJ = 219
∵ KJ = 178
- By using Pythagoras Theorem
∵ (LJ)² = (LK)² + (KJ)²
∴ (219)² = (LK)² + (178)² ⇒ subtract (178)² from both sides
∴ (LK)² = (219)² - (178)²
∴ (LK)² = 16277
∴ LK = √16277 = 127.58
* Lets revise how to find the trigonometry function
# sin Ф = opposite/hypotenuse
# cos Ф = adjacent/hypotenuse
# tan Ф = opposite/adjacent
∵ LK is the opposite side to angle J
∵ LJ is the hypotenuse
∵ sin(J) = LK/LJ
∵ LK = 127.58 , LJ = 219
∴ sin(J) = 127.58/219 = 0.583
∵ LK is the adjacent side to angle L
∵ LJ is the hypotenuse
∵ cos(L) = LK/LJ
∵ LK = 127.58 , LJ = 219
∴ cos(L) = 127.58/219 = 0.583
∴ sin(J) = cos(L)
* The right statement is sin(J) = cos(L)
