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harkovskaia [24]
3 years ago
12

HELP PLEASEEE 9th Grade Geometry

Mathematics
1 answer:
Shtirlitz [24]3 years ago
6 0

Step-by-step explanation:

AD ≅ BC, Given

∠BCD ≅ ∠ADC, Given

CD ≅ CD, Reflexive property

ΔBCD ≅ ΔADC, SAS congruence

∠BDC ≅ ∠ACD, CPCTC

ΔECD is an isosceles triangle, definition of isosceles

DE ≅ CE, properties of isosceles triangles

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How do you simplify 10 square root 96
cupoosta [38]
10 * √96

10 * √(16 * 6)

10 * √16 * √6

10 * 4 * √6

40 * √6

40√6
5 0
4 years ago
Find quadratic equation having zeroes as -3/alpha and 2/alpha
Degger [83]
(x-\frac{2}{\alpha})(x+\frac{3}{\alpha)}=x^{2}+\frac{x}{\alpha}-\frac{6}{\alpha^{2}}
3 0
4 years ago
Lee has $1.75 in dimes and nickels. The number of nickels is 11 more than the number of dimes. How many of each coin does he hav
Schach [20]

Answer:

Lee has 19 nickels and 8 dimes

Step-by-step explanation:

hello, I think I can help you with this

Step 1

Let

value of a nickel=$0.05

value of a dime=$0.10

number of nickels=N

number of nickels=D

According to the question data Lee has $1.75 in dimes and nickels.

0.05N+0.1D=1.75,equation(1)

also, the number of nickels is 11 more than the number of dimes.mathematical speaking

N=11+D,equation(2)

Step 2

replace N from equation (2) into equation (1)

0.05N+0.1D=1.75

0.05(11+D)+0.1D=1.75

Now, solve for D

0.55+0.05D+0.1D=1.75

0.15D=1.75-0.55

D=1.2/0.15

D=8

Step 3

replace the value of D into equation(2) to obtain N

N=11+8

N=11+8

N=19

Hence, Lee has 19 nickels and 8 dimes

Have a great day.

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What is the area and the circumference of a circle with a diameter of 8 m.
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Answer:

50.27m

2 π r

Step-by-step explanation:

8 0
3 years ago
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