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katrin2010 [14]
3 years ago
13

The equation below could be used to solve which of the following problems?

Mathematics
2 answers:
o-na [289]3 years ago
6 0
For these problems, translate key words to operators in an equation:
"is" refers to an equal sign.
"of" refers to multiplication.
letters or variables refer to "what number"

25 = (.65)*w    ------->  25 is 65% of what number
Rina8888 [55]3 years ago
5 0
The answer is A. Twenty-five is 65% of what number?
Why? This is due to how if you multiply 'w'(the number) by 0.65(65%) then you get 25. This indicates that whatever the number is, if it is multiplied by 65% it equals 25. Thus concluding that 25 is 65% of the unknown number.

I hope that helps, have a great rest of your day! ^ ^
{-Ghostgate-}
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6. Darcy jogs 3 km in 20 min.
vivado [14]

Step-by-step explanation:

a) 3km=20 minutes

times both side by 3 as 20x3 is 60mins equal 1 hour

so 3kmx3 is 9km

b) 3km is 20 mins

times both side by 6 as 20x6 is 120 mins which is equivalent to 2 hours

therefore, 3kmx6 is 18km

c) the assumption is that the longer you run means that youll jog more further so more fitness

5 0
4 years ago
In an investigation of pregnancy-induced hypertension, one group of women with this disorder was treated with low-dose aspirin,
AleksandrR [38]

Answer:

Step-by-step explanation:

Given that in an investigation of pregnancy-induced hypertension, one group of women with this disorder was treated with low-dose aspirin, and a second group was given a placebo. A sample consisting of 50 women who received aspirin has mean arterial blood pressure 120mmHg and standard deviation 10mmHg; a sample of 42 women who were given the placebo has mean blood pressure 115mmHg and standard deviation 12mmHg.

Population variances are equal

H_0: \bar x = \bar y\\H_a: \bar x \neq \bar y

(two tailed test at 5% significance level)

Here x denotes group I and Y group II

                  N       Mean     StDev SE Mean

Sample 1   50     120      10  1.4142

Sample 2 42       115      12  1.8516

Pooled std deviation = 10.9565

df=80

Mean difference= 5

Test statistic t = mean diff/std error = \frac{5}{2.3299}=2.1803

p value = 0.0318

since p <0.05 we reject H0

b) We find p >0.01 hence at 1% significance level we accept H0

This implies that 99% confidence interval contains mean difference =0

4 0
4 years ago
Can someone please help me with math.
sergeinik [125]
15. -2
16. A. The pool was originally empty
7 0
3 years ago
If you roll a fair die twice, what is the probability of getting an even number at least once? the answer is 0.75 is it right
lozanna [386]
No it should be a 50% chance because the first roll is a independent variable, 6/12=1/2
7 0
4 years ago
Read 2 more answers
Match each inequality with the correct solution.
Alex73 [517]

Answer:

a. and iii

b. and i

c. and iv

d. and ii

Step-by-step explanation:

a. -\frac{3}{2}x + 12 > 15 = x > -2

           - 12  - 12

 -\frac{3}{2}x > 3

2(  -\frac{3}{2}x = 3)

-3x > 6

/-3    /-3

x > -2

b. 4x + 12 < 20 = x <2

        - 12   - 12

 4x < 8

 /4    /4

  x < 2

c. -8x < 16 = x > -2

   / -8   /-8

  x > -2

d. 55 < 35 + 10x = x > 2

  -35   -35

   20 < 10x

   /10   /10

   2 < x = x > 2

Hope that helps!

3 0
3 years ago
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