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3 years ago

90 is decreased to 75

Mathematics

2 answers:

Viktor [21]3 years ago

5 0

That would be 15 less.

kap26 [50]3 years ago

5 0

$90-x=75$ ⇒ $\boxed { x=15 }\hbox { So, 75 is 15 less than 90. }$

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For their homecoming parade, the students of U-Math have created a colorful banner, 57 meters in length, that is made of two

BartSMP [9]

Answer:

$Length\ of\ the\ long\ piece=40\ meters\\\\Length\ of\ the\ short\ piece=17\ meters$

Step-by-step explanation:

Let be "s" the length in meters of the short piece and "l" the lenght in meters of the long piece.

Set up a system of equations:

$\left \{ {{s+l=57} \atop {s=l-23}} \right.$

Apply the Substitution Method to solve the system. Substitute the second equation into the first equation and solve for "l":

$(l-23)+l=57\\\\2l=80\\\\l=\frac{80}{2}\\\\l=40$

Susbstitute the value of "l" into the second equation in order to find the value of "s". This is:

$s=40-23\\\\s=17$

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3 years ago

What is 0.4 divided by 5.12 in long division

Svetradugi [14.3K]

Start by mult. both 0.4 and 5.12 by 100. What is 40 divided by 512?

___.078_______________
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64 and so on. Calculator answer is 0.078125.

3 0

3 years ago

WILL GIVE BRAINLIEST!

Radda [10]

Answer:

4 ounces of corn and 4 ounces of squash

Step-by-step explanation:

Let S be the no. of ounces of squash

Let C be the no. of ounces of corn

C》2 --> (A)

S》C --> (B)

Total protein 》 3

½C + ¼S》3 --> (C)

Solve A and C simultaneously

½(2) + ¼S = 3

¼S = 2

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C = 2, S = 8

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½S + ¼S = 3

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S = 4

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Three possible extreme combinations

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3 years ago

Adult entrance fees to amusement parks in the United States are normally distributed with a population standard deviation of 2.5

kondor19780726 [428]

Answer: 1.509

Step-by-step explanation:

The formula of Margin of Error for (n<30):-

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Given : Sample size : n= 22

Level of confidence = 0.99

Significance level : $\alpha=1-0.99=0.01$

Using the t-distribution table ,

Critical value : $t_{n-1, \alpha/2}=t_{21,0.005}= 2.831$

Standard deviation: $\sigma=\text{ 2.5 dollars }$

Then, we have

$E=( 2.831)\dfrac{2.5}{\sqrt{22}}\approx1.509$

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3 years ago

Write (9+6/)-(1+3/) as a complex number in standard form

tensa zangetsu [6.8K]

Answer:

9+6=15

1+3=4

15-4=10

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4 years ago