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Georgia [21]
3 years ago
15

15) Find the dimensions of a rectangle with a perimeter of 80m if the length is 10m less than four times the width

Mathematics
1 answer:
yulyashka [42]3 years ago
4 0

Answer:

Width: 10m Length: 30m

Step-by-step explanation:

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3х + 9y - 8x - 2y +7​
Sonja [21]

Answer:

-5x+7y+7

Step-by-step explanation:

3х + 9y - 8x - 2y +7​ can be written like the equation below to help solve it

3x-8x+9y-2y+7

=-5x+7y+7

7 0
3 years ago
Mathematics of inequality
Mnenie [13.5K]

An

chọn  A

Step-by-step explanation:

3x-5>=  4x-3

<=>x <=  -2( -2;-3;-5)

7 0
2 years ago
If a radioactive isotope has a half-life of 6 hours and 12 milligrams is initially present, how much will
Serhud [2]

Answer:0.75 milligrams will  be present in 24 hours

Step-by-step explanation:

Step 1

The formula for radioactive decay can be written as

N(t)=No (1/2)^(t/t 1/2)

where

No= The amount of the radioactive substance at time=0=milligrams

t 1/2= the half-life= 6 hours

t=24 hours

N(t) = the amount at time t

Step 2--- Solving

N(t)=No (1/2)^(t/t 1/2)

=N(t)=12 x ( 1/2) ^ (24/6)

= 12 x (1/2) ^4

= 12 x 0.0625

= 0.75 milligrams

3 0
2 years ago
Evaluate the limit and express your answer in simplest form<br> tar<br> 5/4<br> 4/5<br> 2/3<br> 2/5
muminat

Answer: how do we have the same question need the answer too

Step-by-step explanation:

5 0
3 years ago
Help? Thanks!!!!!!!! If possible show work please!
FrozenT [24]

Answer:

B =102

Y = 32

Step-by-step explanation:

Solving (47):

To solve for B, we have:

B + 50 + 28 = 180 --- sum of angles in a triangle

This gives

B + 78 = 180

Collect like terms

B =- 78 + 180

B =102

Solving (48):

To solve for Y, we have:

X + Y+ Z = 180 --- sum of angles in a triangle

This gives

Y = 180 - X - Z

Where

W+ X=180 -- angle on a straight line

Solve for X

X=180 -W

X=180 -100 = 80

So, we have:

Y = 180 - X - Z

Y = 180 - 80 - 68

Y = 32

5 0
3 years ago
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