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Nataly_w [17]
3 years ago
7

What is 40% of 75? Enter your answer in the box.

Mathematics
2 answers:
Lera25 [3.4K]3 years ago
6 0
40 percent of 75 is 30.
WITCHER [35]3 years ago
6 0

Answer:

30

Step-by-step explanation:

40% of 75

40/100 = x/75

Cross Multiply

40(75) = 100x

3000 = 100x

Divide by 100 on both sides

x = 30

Hope this helps :)

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-2/3(3x-9) = 15 please help
Lina20 [59]
Your answer would be x=-10.5

First distribute -2/3 to 3x and -9
-2x+6=15
Then subtract 6 from both sides
-2x=9
Divide both sides by -2
x=-4.5
6 0
3 years ago
cuanto pagaríamos por un libro cuyo precio es de $25 si le aplicamos un descuento del 25% cuanto dinero ahorramos
kotegsom [21]

Tenemos precio de lista de $25 para el libro.

Si aplicamos un descuento del 25%, este descuento representa:

D=(\frac{25}{100})\cdot25=0.25\cdot25=6.25

Ahorramos $6.25.

El precio que pagamos el libro es $18.75.

P=L-D=25-6.25=18.75

4 0
1 year ago
A student group claims that first-year students at a university must study 2.5 hours (150 minutes) per night during the school w
AlekseyPX

Answer:

We have strong evidence that on average, students study less than 150 minutes per night during the school week

Step-by-step explanation:

Normal distribution:

mean     μ₀ = 150

Sample:

Sample size    n = 272

Sample mean   x = 141

Sample standard deviation  s  = 66

The standard error of the sample mean  SE = σ /√n

SE = 66/√272

SE = 66 / 16,49

SE = 4

Test Hypothesis:

Null hypothesis                            H₀             x  =   μ₀

Alternative hypothesis                Hₐ            x <    μ₀

z(s)  test statistics is:

z(s)  =  ( x  -  μ₀ ) / s/√n

z(s) = - 9 /4

z(s) =  -  2,25

p-value  for that z(s)      p-value  = 0,0122

Then for α =  0,05 p-value < 0,05

We are in the rejection region we need to reject H₀

7 0
3 years ago
How to rewrite equation 5x+7y-35=0 in slope intercept form?<br>​
tino4ka555 [31]
Y equals 5 over 7x minus 5
3 0
2 years ago
The inequality _______________ represents the number of boxes of lightbulbs that Cecil started with.
Vedmedyk [2.9K]

Answer:

The inequality 14

Cecil had 14 boxes of lightbulbs when he started

I think not 100% sure

Step-by-step explanation:

Hope this helps :)

8 0
2 years ago
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