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3 years ago

15 points and brainliest!! please help !!

1 answer:

3 0

This will be solved by solving for x first. Firstly you multiply the top equation by 2 and the bottom by -3. This will change both equation to (top)-10x+6y=-54 and (bottom) 27x-6y=-57. Now when you add the factors the y-values cancel out leaving you with; 17x=-3. now you have to divide by 17 on both sides giving you x=-0.17647058823 (not the prettiest solution but you can round if you want to). After that pick an equation to solve for y (I'm picking the top); the equation will be 5(-0.17647058823)+3y=-27. multiply the negative decimal and 5 to get -0.88235294117 (again not the prettiest). Add that to both sides which will give you 3y=-26.1176470588. After this divide both sides by 3 which will give you y=-8.70588235294. Your answer is (-0.17647058823,-8.70588235294) You can divide to the second or third decimal if needed-----remember that as you round from left to right on a decimal if it's below five you leave it and if it's above 5 then round up 1. I hope this help :)

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A 2015 Gallup poll of 1,627 adults found that only 22% felt fully engaged with their mortgage provider.

Zigmanuir [339]

Answer: $(20.0\%,24.0\%)$

Step-by-step explanation:

Given, A 2015 Gallup poll of 1,627 adults found that only 22% felt fully engaged with their mortgage provider.

Here , 1,627 adults are determining the sample.

Thus, sample size : n = 1627

Also, the sample proportion of adults felt fully engaged with their mortgage provider are $\hat{p}=22\%=0.22$

for 95% confidence level , critical z-value =1.96

Then , the 95% confidence interval would be :-

$\hat{p}\pm z\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

Substituting values , we get

$0.22\pm 1.96(\sqrt{\dfrac{0.22(1-0.22)}{1627}})\\\\=0.22\pm 1.96\sqrt{\dfrac{0.22\times0.78}{1627}}\\\\\approx0.22\pm0.0201\\\\=(0.22-0.0201,\ 0.22+0.0201)\\\\=(0.1999,\ 0.2401)\approx(20.0\%,24.0\%)$

Hence, the required 95% confidence interval using only 1 decimal : $(20.0\%,24.0\%)$ .

4 0

3 years ago

At a neighborhood cookout,

allochka39001 [22]

Answer 45

Step-by-step explanation:

Because 2 times 5 is 10 so 7 times 5 is 35 then add them together.

3 0

3 years ago

A store bought a pair of shoes for $50 and sold it for $80. What percentage was the markup

S_A_V [24]

Answer:

130

Step-by-step explanation:

50+80=130

sorry if i got it wrong

6 0

3 years ago

Read 2 more answers

What's the sum of all numbers less than 10,000 that are divisible by 2, 3, and 5??

Akimi4 [234]

It has a factor of 2*3*5=30
what is the biggest number that is a multipule of 30

hmm
9000
9900
9990 is the biggest
30*333=9990
the summation of an arithetic sequence where first term is a1 and last is an and the number of terms is n
$s= \frac{n(a1+an)}{2}$

30 *2=60
that's 2 terms
30*3=90
30,60,90
3 terms

so 30*n means n terms
9990=30*333 means 333 terms

n=333
a1=30
an=9990
$s= \frac{333(30+9990)}{2}$
$s= \frac{333(10020)}{2}$
$s= \frac{3336660}{2}$
s=1668330

answer is 1,668,330

8 0

3 years ago

The difference between two numbers is 5. three times the larger number is equal to four times the smaller number plus 6. what ar

UkoKoshka [18]

Let x and y represent the smaller and larger numbers, respectively.
y - x = 5 . . . . . the difference is 5
3y = 4x + 6 . . 3 times the larger is 4 times the smaller plus 6

Add x to the first equation to get an expression for y.
y = x + 5
Use that in the second equation.
3(x + 5) = 4x + 6
3x + 15 = 4x + 6 . . . . . eliminate parentheses
9 = x . . . . . . . . . . . . . . add -3x-6
y = x+5 = 14

smaller number: 9
larger number: 14

8 0

3 years ago