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scoundrel [369]
3 years ago
9

2

Mathematics
1 answer:
Greeley [361]3 years ago
8 0

Answer:

A , and C

Step-by-step explanation:

A. 2.3+(-2.3) ➡ 2.3 -2.3 = 0 so this option is correct

B.-3.7+(-4.1) ➡ -3.7 - 4.1 = -7.8 so this option isn't correct

C.-2.6-(-12/4) ➡-2.6 + 3 = 0.4 this option is also correct

D. (5/2)+(-2.5) ➡ 5/2 -5/2 = 0 this one would be undefined because we can't divide 0 by 2 or any other rational numbers

E.72-(-100) ➡72+100= 172 is positive not negative therefore this option is incorrect

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What is the approximate value of b, rounded to the nearest tenth? Use the law of sines to find the answer. Triangle A B C is sho
Setler79 [48]

Answer:

4.7 units

Step-by-step explanation:

We are given that in triangle ABC

AB= 3 units

Angle ABC=76 degree

Angle CAB=66 degrees

AC=b

We have to find the approximate value of b using sin laws.

We know that sum of angles of a triangle =180 degrees

\angle CAB+\angle ABC+\angle ACB=180

76+66+\angle ACB=180

142+\angle ACB=180

\angle ACB=180-142=38^{\circ}

We know that law of sines

\frac{BC}{Sin A}=\frac{AC}{SinB}=\frac{AB}{sin C}

Substitute the values then we get

\frac{b}{sin 76^{\circ}}=\frac{3}{sin 38^{\circ}}

b=\frac{3}{sin 38^{\circ}}\times sin 76^{\circ}

b=4.7

Hence, the value of b= 4.7 units

5 0
4 years ago
Read 2 more answers
Related subtraction fact for 5+7=12
AlekseyPX
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5 0
3 years ago
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Alexus [3.1K]

Answer:

y= 0.75x + -0.50

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7 0
3 years ago
How do I do this I am struggling with solving process
solmaris [256]
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6 0
3 years ago
Scottie is standing next to a lighthouse on the edge of a cliff overlooking the ocean. The cliff is 30 meters above sea level, a
RideAnS [48]

Complete question :

Scottie is standing next to a lighthouse on the edge of a cliff overlooking the ocean. The cliff is 30 meters above

sea level, and the lighthouse has a height of 15 meters. There is a man fishing in a boat directly below Scottie who

has hooked a fish that is 10 meters below the surface of the water.

a. Use positive and negative numbers to represent the locations in relation to sea level.

Scottie =

Top of the lighthouse =

The boat =

The fish =

meters

b. How far is Scottie from the fish?

Answer:

30 m ;

15 m ;

0 m;

40 m

Step-by-step explanation:

Scottie's position = standing on cliff

Height of cliff = 30 m above sea level

Height of lighthouse = 15 meters

Position of fish = 10m below sea level

Above sea level = positive, +

Below sea level = negative, -

Scottie's position = 30 m

Top of lighthouse = 15m

BOAT = surface of sea = 0m

Fish = - 10 m

Distance of Scottie from fish :

Scottie's position - Position of fish

30m - (-10)m

30m + 10m

= 40m

6 0
3 years ago
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