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Blizzard [7]
3 years ago
9

— 3х – 2y = 16 х+ 9y = 28

Mathematics
1 answer:
Alla [95]3 years ago
5 0

Answer:

x=-8

y=4

Step-by-step explanation:

first you multiply this equation (-3x-2y=16) with negativ it will be like this 3x+2y=-16

3x+2y=-16

(x+9y=28)3 _multiply with 3

3x+2y=-16

3x+27y=84

use minus(-) =3x-3x=0

=2y-27y=-25y

=-16-84=-100

the result:-25y=-100

y=4

take any simple equation and replace y with 4

x+9y=28

x+9(4)=28

x+36=28

x=28-36

x=-8

answer:x=-8,y=4

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Answer:

n will be -32

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3 0
3 years ago
Is 0.7 =0.07 reasonable? explain why if its not or it is
MrRissso [65]

Answer:

No

Step-by-step explanation:

No, because 0.7 is greater than 0.07 {Tip: Look for place of the decimal}

0.7 is written as 7/10 and 0.07 is written as 7/100

0.7 which is 7/10 is also written as 70/100 Hence, it clearly that 70/100 is greater than 7/100

0.7 is greater than 0.07 because to compare between two decimal numbers, you should look at the number after the decimal point and 7 is greater than 0 in the tenth place.

[RevyBreeze]

5 0
2 years ago
What is the range of the following data 7, 5, 9, 10, 1, 2, 2, 8 ​
eduard

Answer:

9

Step-by-step explanation:

The range is the biggest number minus the smallest number

The biggest number in this set is 10

The smallest number is 1

10-1=

9

5 0
3 years ago
Read 2 more answers
PLEASE HELP ME!!!!!!!!!!!!!!!!!!! ASAP :)
Mashcka [7]

Answer:

c) The growth factor per days is 1.08

e) The growth factor per hour is 1.08^{1/24}

Step-by-step explanation:

Given the following data;

P(d) = 10 * 1.08^{d} in thousands.

a. To find the number of insects on day 1;

Day, d = 1

P(d) = 10 * 1.08^{d} ......equation 1

Substituting into the formula, we have;

P(1) = 10 * 1.08^{1}

P(1) = 10 * 1.08

P(1) = 10.08

Therefore, option (a) and (b) are incorrect.

c. To find the growth factor per day;

An exponential function is given by the formula;

y = mg^{x} .....equation 2

Where;

g is the growth factor of a population.

Comparing eqn 2 with eqn 1;

g = 1.08

Therefore, option (c) is correct.

e. To find growth factor per hour;

From equation 1 above;

P(1) = 10 * 1.08^{\frac {1}{2}}

Therefore, option e is correct.

4 0
3 years ago
Determine the equation of the line that passes through the given points. (If you have a graphing calculator, you can use the tab
siniylev [52]

Answer:

y = -2x

Step-by-step explanation:

It passes through -5, 10 and 5, -10

gradient = Δy/Δx

gradient = -10 - 10 / 5 -- 5

gradient = -20 / 10

gradient = -2

let's use -5, 10 for y = mx + b

10 = -2(-5) + b

10 = 10 + b

b = 10 - 10

b = 0.

the equation of the line is just y = -2x

6 0
2 years ago
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