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IgorLugansk [536]
4 years ago
14

if 7 dancers were at a dance and 46 more came in and h left and there was 13 dancers left how many was h

Mathematics
1 answer:
TEA [102]4 years ago
5 0
<span>If 7 dancers were at a dance and 46 more came in and h left and there was 13 dancers left how many was h
</span>-  h is 70.
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Kathy's average score after 3 math quizzes was 83. Her score on the 4th quiz was 87. If all 4 of the quizzes are weighted equall
umka21 [38]

Answer:

84

Step-by-step explanation:

Pretend her first 3 quizzes were all 83 since that was the average. So the 4th was 87.

83+83+83+87 = 336

Divide by the total number of quizzes because they are equally weighted.

336/4 = 84

Her new average score is 84.

3 0
3 years ago
In the reaction of hydrogen with iodine
Bond [772]

Answer:

HI hydrogen iodide

Step-by-step explanation:

H2(gas)+I2(gas)---------->2HI(gas)

6 0
3 years ago
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Hey will give brainliest
NeTakaya

Answer:

A

Step-by-step explanation:

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3 0
3 years ago
What are the rounded answers to each question?
matrenka [14]

For the given triangle, m∠G° = 51°, HI = 23.3 units, and GH = 18.9 units.

Step-by-step explanation:

Step 1:

In the triangle, the given angle is 39°, the hypotenuse side's length is 30 units. Assume the opposite side's length is x units.

To determine the opposite side's length, we determine the sin of the angle. To calculate the sin of an angle, we divide the opposite side's length by the hypotenuse's length.

sin\theta= \frac{oppositeside}{hypotenuse}, sin39=\frac{x}{30}.

0.6293 = \frac{x}{30} , x = 18.879.

GH measures 18.879 units. Rounding this off, we get 18.9 units.

Step 2:

Assume the side HI measures y units. According to Pythagoras' theorem,

30^{2}= 18.879^{2} +y^{2} , y^{2}=30^{2}-18.879^{2}.

y^{2} = 543.5834, y = 23.314.

So HI measures 23.314 units. Rounding this off, we get 23.3 units.

Step 3:

GHI is a triangle and all triangles have a total angle of 180°.

\begin{aligned}&\angle G^{\circ}+\angle H^{\circ}+\angle I^{\circ}=180^{\circ},\\&\angle G^{\circ}+90^{\circ}+39^{\circ}=180^{\circ},\\&\angle G^{\circ}=180^{\circ}-129^{\circ}=51^{\circ}.\end{aligned}

So ∠G° measures 51°.

5 0
3 years ago
A 30-60-90 triangle with a hypotenuse of 6 . Find the length of all other sides
andrew-mc [135]
1.  Find the "opposite side," if the angle is 60 degrees and the hyp is 6:
     
                            opp        opp      sqrt(3)
      sin 60 deg = ------- = -------- = ----------
                            hyp          6             2

      Cross-multiplying, 2(opp) = 6sqrt(3), so that opp = 3 sqrt(3) (answer)

2.  Use the Pyth. Thm. to find the "adjacent side:"

       [3sqrt(3)]^2 + x^2 = 6^2, or 9(3) + x^2 = 36, or x^2 = 9, or x = 3.

        

The lengths of the legs of this 30-60-90 triangle are 3 and 3 sqrt(3).

check:  Does 3^2 + [3sqrt(3)]^2 = 6^2?
              Does 9 + 9(3) =              6^2?   YES
8 0
3 years ago
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