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Diano4ka-milaya [45]
3 years ago
10

Need help with this

Mathematics
1 answer:
pishuonlain [190]3 years ago
7 0

infinetly many because

for example if 5=5 on a graph. both lines would always touch

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HURRY 25 POINTS mathssas
polet [3.4K]

Answer:

6.6875 correct to 4 s.f

Step-by-step explanation:

T=m/f

T=120/25.6

T=6.6875 correct to 4 s.f

8 0
3 years ago
____2. Find the value of x<br><br> A 16 C 50<br> B 34 D 70
olga2289 [7]
50.........................
6 0
3 years ago
Can someone plz help me with this one problem!!!
blagie [28]

Answer:

yes

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Answer the problem :)
Tomtit [17]
The domain is the value of x. In this case, -3≤x≤7
the range is the value of y. in this case, -1≤y≤9

this is not a function, because the same x value has two corresponding y values. For example, when x=5, y=0 or y=8

It IS a function if every x value has only one corresponding y value. 
5 0
3 years ago
In the isosceles △ABC m∠ACB=120° and AD is an altitude to leg BC . What is the distance from D to base AB , if CD=4cm?
snow_lady [41]

If ΔACB is an isosceles triangle, then ∠A ≅ ∠B and AC ≅ CB

Since ∠C = 120° and ∠A + ∠B + ∠C = 180°, then ∠A = 30° and ∠B = 30°

Next, look at ΔADB.  ∠A + ∠D + ∠B = 180°, so ∠A + 90° + 30° = 180° ⇒ ∠A = 30°

Now look at ΔADC.  Since ∠A = 30° in ΔACB, and ∠A = 60° in ΔADB, then ∠A = 30° in ΔADC <em>per angle addition postulate.</em>

Now that we have shown that ΔADB and ΔADC are 30-60-90 triangles, we can use that formula to calculate the side lengths.

CD = 4 cm (given) so AC = 2(4 cm) = 8 cm

Since AC ≅ BC, then BC = 8 cm. Therefore, BD = 4 + 8 = 12 <em>by segment addition postulate.</em>

Lastly, look at ΔBHD.  Since ∠B = 30° and ∠H = 90°, then ∠D = 60°. So, ΔBHD is also a 30-60-90 triangle.

BD = 12 cm, so HD = \frac{12}{2}cm = 6 cm

Answer: 6 cm



8 0
3 years ago
Read 2 more answers
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