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2 years ago

-3 2/3 + 2 2/5= Please help

Mathematics

1 answer:

Anton [14]2 years ago

7 0

Answer:

-19/15 or -1 and 4/15

you can turn them into improper fractions then do the butterfly method

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3x - 4y = 7

Alina [70]

3x - 4y = 7
-(3x + 2y = -5)

= 0 - 6y = 12
-6y = 12
y = -2
The resulting equation would be y = -2.

4 0

2 years ago

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Rowan is taking his siblings to get ice cream. They can't decide whether to get a cone or a cup because they want to get the mos

Simora [160]

Answer

Step-by-step explanation:

4 0

2 years ago

If y varies directly as x, and y is 6 when x is 72, what is the value of y when x is 8?

Eddi Din [679]

Answer:

2/3

Step-by-step explanation:

Y varies directly as x

Y =kx

Y=6 when x = 72

First find the relationship between y and x.

i.e find the value of k

Substitute the value of x and y

6 = k *72

Make k the subject of the formula

K = 6/72

K= 1/12

:. The rlationship between x and y is

Y = 1/12x

When x is 8

Y = 1/12 * 8

Y = 8/12

Y = 2/3 and that is the answer

Hope it helped you

3 0

3 years ago

Read 2 more answers

I need help!! <br><br> Simplify this complex fraction

Illusion [34]

I think it is A :)))

6 0

2 years ago

The life in hours of a 75-watt light bulb is known to be normally distributed with standard deviation σ = 25 hours. A random sam

irina [24]

Answer: a) (1008.34,1019.658) b) (1009.24,1018.76)

Step-by-step explanation:

Since we have given that

n = 75

mean = 1014 hours

Standard deviation = 25 hours

At 95% two sided , z = 1.96

So, confidence interval would be

$\bar{x}\pm z\dfrac{\sigma}{\sqrt{n}}\\\\=1014\pm 1.96\dfrac{25}{\sqrt{75}}\\\\=1014\pm 5.658\\\\=(1014-5.658,1014+5.658)\\\\=(1008.34,1019.658)$

(b) Construct a 95% lower confidence bound on the mean life.

z = 1.65

So, confidence interval would be

$\bar{x}\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1014\pm 1.65\times \dfrac{25}{\sqrt{75}}\\\\=1014\pm 4.76\\\\=(1014-4.76,1014+4.76)\\\\=(1009.24,1018.76)$

Hence, a) (1008.34,1019.658) b) (1009.24,1018.76)

4 0

3 years ago