3 years ago

Can some please help me with this question

Mathematics

1 answer:

kumpel [21]3 years ago

6 0

The scale is 1cm=14km.

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olasank [31]

The slope is 10. For every 1 increase in x, y increases by 10.

8 0

2 years ago

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If x2 + y2 = 14 and xy = 5, find the value of (1/2 x + 1/2 y)2.

aleksley [76]

Answer:

(½x+½y)²=6

Step-by-step explanation:

x^2 + y^2 = 14, xy=5

(A+B)^2=A^2 +2AB+B^2... (*)

(1/2x+1/2y)^2 =(*)

(1/2x)^2 +2(1/2x)(1/2y)+(1/2y)^2 =

1/4x^2 +1/2xy+1/4y^2=

1/4(x^2 +y^2) +1/2(xy)=

1/4*14+1/2*5=

14/4+5/2=

14/4+10/4=

24/4=6

let me know if I'm wrong.

5 0

2 years ago

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Write an equation to show that Y is directly proportional to x using the constant of proportionality given. Then solve for the u

olga55 [171]

Answer:

y = 2 $\frac{5}{11}$

Step-by-step explanation:

y ∝ kx

y = $\frac{3}{11}$ × 9 = $2\frac{5}{11}$

8 0

3 years ago

I have way more questions than this answer them if you want pleaseee!!

aliina [53]

The right answer is Option C.

Step-by-step explanation:

Given inequality is

6(2x-1) > 24

Solving the inequality

$6*2x-1*6>24\\12x-6>24$

Adding 6 on both sides

$12x-6+6>24+6\\12x>30$

Dividing both sides by 12

$\frac{12x}{12}>\frac{30}{12}\\x>\frac{5}{2}$

Therefore,

$x>\frac{5}{2}$

The right answer is Option C.

Keywords: inequality, division

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2 years ago

The SI unit for speed is<br> a. m.<br> b. m/s.<br> c. m/s².<br> d. m/s west.

aniked [119]

Speed = Distance / Time

SI unit for Distance is meters, m, and for time is seconds, s,

Speed = Distance / Time = m/s

Option b.

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3 years ago