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BartSMP [9]
2 years ago
7

If y varies inversely to x and y=9 when x=-6 find x when y=3

Mathematics
2 answers:
Minchanka [31]2 years ago
8 0

Answer: y =21

Step-by-step explanati

aksik [14]2 years ago
5 0

Answer:

4.5

Step-by-step explanation:

we have to do  Unitary method.

when y=9 then x=6

when y=1 the x=9/6

when y=3 then x=(9*3)/6

x=4.5

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(-12)÷6+2 pls help math is hard for me
SVEN [57.7K]

The Answer is -3/2

Below is how I got that answer

(-12) / 6+2

-12/ 8  (Simplify the problem by adding 6 and 2, remove the parenthesis).

-3/2 (Simplify -12/8 by dividing it by 4)

4 0
3 years ago
Solve 10e^2x - 5 =23^x for x.
yawa3891 [41]

10e^{2x}-5=23e^x\qquad\text{subtract}\ 23e^x\ \text{from both sides}\\\\10e^{2x}-23e^x-5=0\\\\10(e^x)^2-23(e^x)-5=0\\\\\text{substitution:}\ e^x=t > 0\\\\10t^2-23t-5=0\\\\10t^2-25t+2t-5=0\\\\5t(2t-5)+1(2t-5)=0\\\\(2t-5)(5t+1)=0\iff2t-5=0\ \vee\ 5t+1=0\\\\2t=5\ \vee\ 5t=-1\\\\t=\dfrac{5}{2} > 0\ \vee\ t=-\dfrac{1}{5} < 0\\\\\text{therefore}\ e^x=\dfrac{5}{2}\to\ln e^x=\ln\left(\dfrac{5}{2}\right)\\\\\boxed{x=\ln\left(\dfrac{5}{2}\right)}

5 0
3 years ago
Read 2 more answers
Order Of operation.
Nikolay [14]

Answer

18(2)+12(2)-4(5)

36+24-20

60-20

40

Step-by-step explanation:

since they had two-18 yard passes and two 12 yard runs, that's the first part of the expression, and then they had four penalties that cost them 5 yards, and that was the last term. When you simplify, you end up with 40 yards gained.

In math

Passes: 18(2)

Runs: 12(2)

Penalties:4(5)

equation

18(2)*12(2)-4(5)

Hope it helped

7 0
3 years ago
Read 2 more answers
Given that €1=£0.72 how much is €410 in £ what is the £ to € exchange rate
Virty [35]

Answer:

As per the given statement:

€1 = £0.72

Find how much is €410 in £.

then;

€410 = 0.72 \times 410 = £295.2

Hence, £295.2 much is €410.

to find, the exchange rate of £ to €:

€1 = £0.72

Divide both sides by 0.72 we get;

£1 = €1.389

4 0
3 years ago
Jasmine is buying beans. She bought r pounds of red beans that cost $2 per pound and b pounds of
horsena [70]

Answer:

A and B (2r and 7b)

Step-by-step explanation:

If she has black beans that cost $7 per pound the expression should be 7b. Hope this helps! Lmk if you have any more questions.

4 0
2 years ago
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