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brie7396
15.07.2019 •
Mathematics
Can someone me step up and solve this problem
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Ответ:
Problem 5
The sum of two numbers is 175
Let the two numbers be x and y
Therefore x + y = 175
Their difference is = x - y and is equal to 19
x + y = 175
x - y = 19 Add
2x = 194 Divide by 2
x = 194/2
x = 97
x + y = 175
97 + y = 175
y = 175 - 97
y = 78
Problem 4
Let the nickels = N
Let the Pennies = P
N + P = 199 (1)
0.05*N +0.01 P = 7.67 Multiply the entire equation by 100
5N + P = 767 (2) Multiply equation (1) by 5 and subtract.
5N +5P =995
- 4P = - 228 Divide by -4
P = 57
N + P = 199
N + 57 = 199
N = 199 - 57
N = 142
Answer
Pennies = 57
Nickels = 142
Check
142*5 + 57*1 = ? 767
710 + 57 = ? 767
767 = 767
Ответ:
*see attachment for the diagram
Answer/Step-by-step explanation:
1. Antonio's statement is correct because the sum of measure of the minor intercepted arc DE and the angle formed by tangents CE and CD outside the circle equal 180°.
According to the theorem. Therefore, the statement
is correct.
2. To find the measure of <A, which is a central angle of the circle, find the value of x. Then find the measure of the intercepted arc.
According to the central angle theorem, the measure of a central angle equal the intercepted minor arc.
Therefore, the measure of the intercepted minor arc DE = m<A.
Step 1: find the value of x using the equation gotten in question 1.
Combine like terms
Step 2: find the measure of the minor intercepted arc DE, by substituting x = 25 into 5x - 2.
measure of arc DE = 5x - 2
= 5(25) - 2 = 125 - 2
measure of arc DE = 123°
Step 3: find the measure of centra angle A.
m<A = intercepted arc DE (central angle theorem)
m<A = 123°