Ask question

Ask question

All categories

3 years ago

7

Mallory is buying bedroom furniture for $1,789.43. The dresser is 39.7% of the total cost. Which is the best estimate for the co

st of the dresser?
A. $5.40
B. $6.30
C. $720
D. $810

1 answer:

jasenka [17]3 years ago

3 0

C
because you cross multiply 1789.43*39.7 then divide by 100 and you result in <span>710.4037 which is the closest to c
<span><span><span><span><span>

</span></span></span></span></span></span>

You might be interested in

Three numbers are in the ratio 3:4:5. If the smallest is 2x−7, what is the product of the two other numbers?

maw [93]

Answer:

The product is;

(80x^2-560x+ 980)/9

Step-by-step explanation:

Here, we want to get the product of the two smaller numbers

let the mid number be y

3/4 = 2x-7/y

3y = 8x-28

y = (8x-28)/3

Let the biggest be z

3/5 = 2x-7/z

3z = 10x -35

z = (10x-35)/3

The product of the two other numbers is thus;

(10x-35)/3 * (8x-28)/3

= (10x-35)(8x-28)/9

(80x^2-280x - 280x + 980)9

= (80x^2 - 560x + 980)/9

6 0

3 years ago

A researcher took a random sample of 100 students from a large university. She computed a 95% confidence interval to estimate th

katen-ka-za [31]

Answer:

Part (A): The correct option is true.

Part (B): The null and alternative hypothesis should be:

$H_o: \mu =0 ; H_a:\mu \neq0$

Step-by-step explanation:

Consider the provided information.

Part (A)

A random sample of 100 students from a large university.

Increasing the sample size decreases the confidence intervals, as it increases the standard error.

If the researcher increase the sample size to 150 which is greater than 100 that will decrease the confidence intervals or the researcher could produce a narrower confidence interval.

Hence, the correct option is true.

Part (B)

The researcher wants to identify that whether there is any significant difference between the measurement of the blood pressure.

Therefore, the null and alternative hypothesis should be:

$H_o: \mu =0 ; H_a:\mu \neq0$

7 0

3 years ago

There were 516 tickets sold for a basketball game. The activity cardholder tickets cost 1.25 and the non ticket holders ticket w

xxTIMURxx [149]

Answer:

card holder ticket was 807 and non holder is 403.5 (rounded up) is 403.50. Have a nice day.

3 0

3 years ago

Write the expression as a single logarithm. 5logby+ 4logbx

balandron [24]

To write the expression 5logby+ 4logbx, you need to know the laws of logarithm. These laws will help you what will be the type of logarithm that will fit in the given expression. For multiplication, log a + log b = logab and for a logarithm that has a coefficient, 5logb = logb⁵. So the answer is
<span>
</span>5logby+ 4logbx
<span>logb y</span>⁵ + logb x⁴
<span>logb y</span>⁵x⁴<span>
The answer is letter B.
</span>

5 0

3 years ago

Solve using the quadratic formula. Show all work. Write each solution in simplest form. No decimals.

Paraphin [41]

Answer:

D

Step-by-step explanation:

For a quadratic equation ax² +bx +c= 0, the quadratic formula is as below:

$\boxed{x = \frac{ - b± \sqrt{ {b}^{2} - 4ac } }{2a} }$

x² -12x +7= 0

$x = \frac{ - ( - 12)± \sqrt{( - 12) {}^{2} - 4(1)(7) } }{2(1)}$

$x = \frac{12± \sqrt{144 - 28} }{2}$

$x = \frac{12± \sqrt{116} }{2}$

$x = \frac{12± \sqrt{4(29)} }{2}$

$x = \frac{12±( \sqrt{4})( \sqrt{29} )}{2}$

$x = \frac{12±2 \sqrt{29} }{2}$

$x = 6± \sqrt{29}$

$∴x = 6 + \sqrt{29} \: \: \: or \: \: \:x = 6 - \sqrt{29}$

6 0

3 years ago