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LenKa [72]
2 years ago
15

What is the direct variation between x and y when x=7 and y=3 1/2?

Mathematics
1 answer:
Sergeu [11.5K]2 years ago
6 0

Answer:

{ \tt{y  \: \alpha \: x }} \\ { \tt{y = kx}} \\  \\ { \bf{3 \frac{1}{2}  = k \times 7 }} \\ { \bf{k =  \frac{1}{2} }} \\  \\ { \tt{y =  \frac{1}{2}x }} \\  \\ { \tt{y = 0.5x}}

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Help please anybody
Sedbober [7]

put in an positive number for x and check

2 - 5 = -3

5 - 2  = 3

- 2 + 5 = 3

5 + (-2) = 2

so the only different one is the first

4 0
3 years ago
In triangle ABC, m∠ABC = (4x – 12)° and
Anestetic [448]

Answer:

A triangle is equilateral if all three angles are same. but here two angles are 64° but third angle is 52°. so, Yin is incorrect.

Step-by-step explanation:

x = 19,

Putting value of x to find m∠ABC and m∠ACB

m∠ABC = (4x – 12)°

m∠ABC = (4(19) – 12)°

m∠ABC = (76 – 12)°

m∠ABC = 64°

m∠ACB = (2(19) + 26)°

m∠ACB = (38 + 26)°

m∠ACB = 64°

now we know sum of angles of triangle is 180°. We can find the measure of third angle.

180 = 64+64 +x

x= 180 - 64 - 64

x = 52°

A triangle is equilateral if all three angles are same. but here two angles are 64° but third angle is 52°. so, Yin is incorrect.

5 0
3 years ago
Read 2 more answers
Ayo help me please<br><br> 4 5/6 x 2/5
Law Incorporation [45]

Answer:

19.3333333

Step-by-step explanation:

You make an improper fraction and multiply

3 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=-a-%5Cfrac%7B7%7D%7B8%7D%20a" id="TexFormula1" title="-a-\frac{7}{8} a" alt="-a-\frac{7}{8} a"
Virty [35]

Step-by-step explanation:

-a-7a/8

-8a-7a/8

-15a/8

Hope it helps you

6 0
3 years ago
Read 2 more answers
1) f(x) = - x2 + 4x - 10<br> Find f(5)
Natali5045456 [20]
Substitute the x with 5
-(5)2 + 4(5) - 10 = 0
3 0
3 years ago
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