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andreyandreev [35.5K]
3 years ago
6

I'm not sure what to now but this is what i have right now

Mathematics
2 answers:
zzz [600]3 years ago
6 0

Answer:

1/2y-5=-7

+5

1/2y=-2

divide by 1/2=

y=-4

Hope This Helps!!!

Svetradugi [14.3K]3 years ago
6 0

\frac{1}{2} y - 5 =  - 7

\frac{1}{2} y =  - 7 + 5

\frac{1}{2} y =  - 2

y =  - 2 \div  \frac{1}{2}

y =  - 2 \times  \frac{2}{1}  =  - 2 \times 2

y =  - 4

Answer: y = -4

ok done. Thank to me :>

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Draw the triangle that is the image of the given triangle after dilation with center ​(0​,0​) and a scale factor of 1/4 (one fou
solong [7]

Hey there!

Your answer is C.

If you take the lengths of the legs of the triangle, which are 12 and 4, we can multiply them by the scale factor to see what the legs of our new triangle is.

12 x 1/4 = 3

4 x 1/4 = 1

So, the legs of our new triangle have lengths of 1 and 3.

We can see that option C has the correct triangle in red.

If we're looking at the ratio of rise to run of each triangle, it is 1/3 for both the large triangle and the small triangle.

The rise for the larger triangle is 4, and the run is 12. That is 4/12, which can be simplified to 1/3.

The rise for the smaller triangle is 1, and the run is 3. That is 1/3, which is all the way simplified already.

These triangles are similar because the first one was dilated to get the second one, which explains why the ratios are the same.

Hope this helps!  

6 0
3 years ago
Help plz ASAP
Aleks [24]

Answer:

B.

Step-by-step explanation:

3 0
3 years ago
A recipe calls for 4 cups of sugar to 5 cups of flour. How many cup(s) of
Lubov Fominskaja [6]

Answer:

4/9

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Six times a number is greater than 20 more than that number. What are the possible values of that number? On-4 On>4 20 On>
Vaselesa [24]

Answer:

a > 4

Step-by-step explanation:

6a > 20 + a \\ collect \: like \: terms \\ 6a - a > 20 \\ then \: add \\ 5a \: > 20 \\ divide \: both \: sides \: by \: 5 \\  \frac{5a}{5} > \frac{20}{5} \\ a > 4

8 0
2 years ago
A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 3%
andre [41]

Answer:  a) 683   b) 1067

Step-by-step explanation:

The confidence interval for population proportion is given by :-

p\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}

a) Given : Significance level :\alpha=1-0.95=0.05

Critical value : z_{\alpha/2}}=\pm1.96

Margin of error : E=0.03

Formula to calculate the sample size needed for interval estimate of population proportion :-

n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.2(0.8)(\dfrac{1.96}{0.03})^2=682.951111111\approx683

Hence, the required sample size would be 683 .

b) If no estimate of the sample proportion is available then the formula to calculate sample size will be :-

n=0.25(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.96}{0.03})^2=1067.11111111\approx1067

Hence, the required sample size would be 1067 .

3 0
3 years ago
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