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4 years ago

Which of these numbers rolands to 7.6? 7546 • 7630 7670 7720

Mathematics

1 answer:

Evgesh-ka [11]4 years ago

7 0

Answer:

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Step-by-step explanation:

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Solve using substitution y = 4 - 2x + 4y = 12

tensa zangetsu [6.8K]

ANSWER:

The value of x is 2 and of y is 4

$(2,4)$

STEP-BY-STEP EXPLANATION:

We have the following equation system

$\begin{gathered} y=4 \\ -2x+4y=12 \end{gathered}$

solving for substitution:

$\begin{gathered} -2x+4\cdot4=12 \\ -2x+16=12 \\ -2x=12-16 \\ x=\frac{-4}{-2} \\ x=2 \end{gathered}$

5 0

1 year ago

−x + y = 6<br> 2x + y = −12

mote1985 [20]

Answer: 6, 12

-x+y=6 [eq.1]

2x + y = - 12 [eq.2]

[eq.2] - [eq.1]

2x + y - (-x) - y = - 12 - 6

2x +x =-18

3x=18

x = 18/3

ans: x = 6

substituting x=6 in [eq.1]

-x + y = 6

-6 +y =6

ans: y= 12

3 0

3 years ago

Jim drives his children to their sports activities outside of school. When he drives his son to baseball practice, it is a 6-km

trapecia [35]

Answer:

17.4 kilometers per week

Step-by-step explanation:

we know that

The number of kilometers that Jim drives a week is equal to the number of baseball practice multiplied by its round trip plus the number basketball practice multiplied by its round trip

Remember that

$1\ km=1,000\ m$

$1,800\ m=1,800/1,000=1.8\ km$

$2(6)+3(1.8)=17.4\ km$

6 0

3 years ago

Please help!!

kompoz [17]

$27)~x^2+4x-60=(x-6)(x+10)\leftarrow\text{The two expressions.}\\\\
28)~\dfrac{x^2+11x+28}{x+4}=\dfrac{(x+4)(x+7)}{(x+4)}=x+7\\\\
29)~\dfrac{y^2-1}{y-1}=\dfrac{(y-1)(y+1)}{(y-1)}=y+1$

8 0

3 years ago

Read 2 more answers

Match the behavior if the graph of a function with the slope of its graph

Paha777 [63]

Answer:

Step-by-step explanation:

6 0

3 years ago