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3 years ago

✨ILL GIVE Brainalist I SWEAR. BTW THERE coMparing uniT PROPORTIONS PLS

Mathematics

2 answers:

scoundrel [369]3 years ago

8 0

Answer:

Three t-shirts for $28.95

Step-by-step explanation:

Three t-shirts for $28.95

Cost of one: $28.95/3 = $9.65

Four t-shirts priced at $39

Cost of one: $39/4 = $9.75

Five t-shirts for $49.95

Cost of one: $49.95/5 = $9.99

The cheapest option is the first one

Shkiper50 [21]3 years ago

4 0

Answer:

do the dead easy calculation read explanation I have no calculator atm

Step-by-step explanation:

so what you want to do is take the amount of cost and divide by number of shirts to find price per shirt and see which one is cheapest

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The scale drawing of a concrete pad has a length of 9.1 cm, a depth of 2.2 cm and a width of 3.8 cm.

valentina_108 [34]

Answer ; 242 cm because 418/3.8 =110 and if you multiply 110 with 2.2 you’ll have 242 !!

3 0

3 years ago

Please help with this inequality.

iren [92.7K]

44 $\geq$ -3x + 2 > 14.
-2 -2 -2

42 $\geq$ -3x > 12
-------------------------------------
-3 -3 -3 (dividing with inequalities by a negative flips the inequality symbol)

-14 $\leq$ x < -4

3 0

3 years ago

What multiples to 42 and adds to -2

solniwko [45]

Answer:

Step-by-step explanation:

xy = 42

x+y = - 2 Substitute into the top equation

y = -2 - x Put in for y

x(-2 - x) = 42 Remove the brackets

-2x - x^2 = 42 Subtract 42 from both sides.

-2x - x^2 - 42 = 0 Put in the more normal order.

-x^2 - 2x - 42 = 0 Multiply by -1

x^2 + 2x + 42 = 0

This cannot be factored. It gives complex roots as it is written. I will give you the answer but I kind of doubt the question is correct.

x1 = - 1 + 6.40i

x2 = -1 - 6.40i

Leave a comment if you have a correction.

4 0

4 years ago

suppose a population consists of 5000 being surveyed could result in sample statistic but not parameter

Talja [164]

Huh? What is the question here???

4 0

3 years ago

A random sample of 4000 college students yielded 2250 who are in favor of banning Hawaiian shirts. Estimate the true proportion

Andreas93 [3]

Answer: (0.5496, 0.5754)

Step-by-step explanation:

The confidence interval for population proportion (p) is given by :-

$\hat{p}\pm z*\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$ , where $\hat{p}$ = Sample proportion , n= sample size , z*= Critical z-value.

Let p be the proportion of all college students who are in favor of banning Hawaiian shirt.

Given, A random sample of 4000 college students yielded 2250 who are in favor of banning Hawaiian shirts.

i.e. n=4000

$\hat{p}=\dfrac{2250}{4000}=0.5625$

z-value for 90% confidence level is 1.645

Now , 90% confidence interval for p would be :

$0.5625\pm (1.645)(\sqrt{\dfrac{0.5625(1-0.5625)}{4000}})$

$=0.5625\pm (1.645)(\sqrt{0.0000615234375})\\\\=0.5625\pm (1.645)(0.00784368774876)\\\\\approx0.5625\pm0.0129\\\\=(0.5625-0.0129, \ 0.5625+0.0129)\\\\=(0.5496,\ 0.5754)$

Hence, the required 90% interval = (0.5496, 0.5754)

6 0

4 years ago