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Leya [2.2K]
3 years ago
9

3x + 8y = -1-3x + y = -17​

Mathematics
2 answers:
Alex777 [14]3 years ago
8 0

Answer:

Point form : (5,-2)

Equation form : x=5, y=-2

Step-by-step explanation: Solve for the first variable in one of the equations, then substitute the result into the other equation.

snow_tiger [21]3 years ago
3 0

Answer:

Step-by-step explanation: what the hell

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The function f(x) = –2x2 + 32 represents the height of an object, f(x), after x seconds. How many seconds does it take for the o
Law Incorporation [45]

Given:

The height of an object, f(x), after x seconds is

f(x)=-2x^2+32

To find:

The time taken be object to hit the ground.

Solution:

We have,

f(x)=-2x^2+32

The object will hit the ground if the height is 0, i.e., f(x)=0.

0=-2x^2+32

2x^2=32

Divide both sides by 2.

x^2=\dfrac{32}{2}

x^2=16

Taking square root on both sides.

x=\pm 4

Time cannot be negative. So, x=4.

Therefore, the object will hit the ground after 4 seconds.

5 0
3 years ago
Which is more, 3 yards or 107 inches? 3 yards 107 inches neither; they are equal Submit
MakcuM [25]

We know, 1 yard=3 feet.

1 feet =12 inches.

Therefore, 1 yard in inches is,

\begin{gathered} 1\text{ yard=3 f}eet\times\frac{12\text{ inches}}{1\text{ feet}} \\ =36\text{ inches} \end{gathered}

Hence, 3 yards in inches is.,

\begin{gathered} 3\text{ yards=3}\times36\text{ inches} \\ =108\text{ inches} \end{gathered}

Therefore, 3 yards is greater than 107 inches.

5 0
2 years ago
What is the answer negative one times the sum of one and seven times a number, decreased by 6 times the difference of negative s
Setler79 [48]

Answer:

The number is -79.

Step-by-step explanation:

Let's set up equation for the given information.

Let the number as 'x'

Negative 1 times the sum of one and seven times a number x could be written as -1(1+7 x).

Now, 6 times the difference of negative seven and a number could be written as

6(-7-x)

Now,

-1(1+7 x) decreased by 6(-7-x) equals 36

So, we can set up equation as

-1(1+7 x)-6(-7-x)=36

Solve the equation for x

-1-7 x-42+6 x=36

Combine like terms

-x-43 =36

Add both sides 43

-x=79

Divide both sides by -1.

x=79

5 0
3 years ago
What is the average cost of 7 articles if 3 of them cost 30k each and the rest cost 12.5k each ​
LenKa [72]

{\bold{\red{\huge{\mathbb{QUESTION}}}}}

what is the average cost of 7 articles if 3 of them cost 30k each and the rest cost 12.5k each

\bold{ \red{\star{\blue{GIVEN }}}}

TOTAL NUMBER OF ARTICLE= 7

ARTICLES FOR 30K = 3

ARTICLES FOR 12.5K = 7-3= 4

\bold{\blue{\star{\red{TO \:  \: FIND}}}}

Average cost of 7 articles

\bold{  \green{ \star{ \orange{FORMULA \:  USED}}}}

\red{AVERAGE  =  \frac{TOTAL \:  COST}{ NUMBER  \: OF\: ARTICLES }}

\huge\mathbb{\red A \pink{N}\purple{S} \blue{W} \orange{ER}}

Average \:  cost  \: of  \: 7  \: articles -  >  \\  \frac{(3 \times 30k) + (12 .5k \times 4)}{7}  \\  \frac{90k + 50k}{7}  \\  \frac{140k}{7}  \\  \blue {Average \:  cost  \: of  \: 7  \: articles -  >} \\ 20k

5 0
3 years ago
The cost of four sweats and two pairs of jeans is $140. The cost of two sweats and theee pairs of jeans is $150. Define the vari
posledela

Answer:

The system would be:

4x + 2y = 140

2x + 3y = 150

Step-by-step explanation:

If we represent the cost of sweats by the letter x and the jeans by the letter y, we can then write an equation for each of the situations using the number of each in each situation.

4x + 2y = 140

2x + 3y = 150

8 0
4 years ago
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