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2 years ago

-4+(-3) help please thanks

Mathematics

2 answers:

madreJ [45]2 years ago

6 0

-7 is correct because a negative plus a negative is always a negative

Bingel [31]2 years ago

6 0

-4+(-3)=-7

When adding two negatives, the answer will always be negative. I hope this helps.

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Ryan found a pattern on the addition table . He shaded two diagonal lines that show his pattern. What is his pattern?

LenaWriter [7]

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6 0

2 years ago

Exercise 6.12 presents the results of a poll where 48% of 331 Americans who decide to not go to college do so because they canno

tensa zangetsu [6.8K]

<h2>Answer with explanation:</h2>

As per given , we have

$\hat{p}=0.48$ , n=331

Critical value for 90% Confidence interval : $z_{\alpha/2}=1.645$

a) Confidence interval :

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

$0.48\pm (1.645)\sqrt{\dfrac{0.48(1-0.48)}{331}}\\\\\approx 0.48\pm0.02746\\\\=(0.48-0.02746,\ 0.48+0.02746)\\\\=(0.45254,\ 0.50746)$

Hence, a 90% confidence interval for the proportion of Americans who decide to not go to college because they cannot a ord it : $(0.45254,\ 0.50746)$

b) Margin of error : E=1.5%=0.015

Formula for sample size : $n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

For p =0.48 , we have

$n=0.48(1-0.48)(\dfrac{1.645}{0.015})^2=3001.88373333\approx3002$

Hence, the required sample size to survey = 3002

6 0

2 years ago

X (minutes) y (bedsheets)

pickupchik [31]

Is that IXL? Anyway I think it’s 8 but I don’t think so anyway I tried don’t rely on me

5 0

2 years ago

Melissa owns a credit card with a 8.9% APR that calculates interest using the ADB excluding new purchases method. The balance af

ira [324]

Answer:

$4.081

Step-by-step explanation:

We have been given that Melissa owns a credit card with a 8.9% APR. The balance after her last billing cycle was $550.

First of all, we will find period rate by dividing APR by 12 as 1 years equals 12 months.

$\text{Period rate}=\frac{8.9\%}{12}=0.74166\%$

The finance charge would be 0.74166% of $550.

$\text{The finance charge}=\$550\times \frac{0.742}{100}$

$\text{The finance charge}=\$550\times 0.00742$

$\text{The finance charge}=\$4.081$

Therefore, the finance charge would be $4.081.

4 0

2 years ago

The baker pays $0.80 per pound for sugar and $1.25 per pound for butter. Write an expression that shows how much the baker will

alekssr [168]

X is sugar
y is butter
z is total money

$0.80x + $1.25y = z

the total money spent if the Baker bought 6 pounds of butter and 20 pounds of sugar would be $23.50.

5 0

2 years ago

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