MATHEMATICS MIDDLE SCHOOL

Can anyone help me solve this system of equation by elimination?5x+4y=-30
3x-9y=-18

Answers

Answer 1
Answer: \begin{cases}5x+4y=-30\ \ / \cdot (-3) \n3x-9y=-18\ \ / \cdot 5 \end{cases}\n\n \begin{cases}-15x-12y=90 \n15x-45y=-90 \end{cases}\n+\ --------\n -57y=0 \n y=0 \n\n 5x+4y=-30\n5x+4 \cdot 0=-30 \n5x=-30 \ \ / :5 \nx=-(30)/(5)\nx=-6 \n \nAnswer : \n\n \begin{cases} x=-6 \n y=0 \end{cases}

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Mr and Mrs Baker place 12-inch rulers along the length of a rug. They each line up 3 rulers along the edge of the rug. What is the length of the rug? about__feet

Answers

3 Feet
12 inches= 1 foot
36 inches = 3 feet
The length of the rug would be about 36 feet because 12x3=36.

bicyclist Mario Cipollini pedaled one stage of the 1999 tour de France in about 3.9 hours If he traveled about 195 kilometers what was his average speed in kilometers per hour

Answers

v=195/3.9=50 km/h

is the answer

Is 5.1 less than 5.06

Answers

Answer:

5.1 IS less than 5.06

Step-by-step explanation:

5.1 is less than 5.06 because you can always add and take away the zero if you wanted to.
No 5.1 = 5.10 and 5.10 is greater than 5.06

What is the volume of the following rectangular prism?

Answers

Answer:  The required volume of the given rectangular prism is 14(2)/(3)~\textup{cubic units}.

Step-by-step explanation:  We are given to find the volume of the rectangular prism shown in the figure.

We know that

the VOLUME of a rectangular prism with base area b sq. units and height h units is given by

A=bh.

For the given rectangular prism, we have

b=7(1)/(3)=(22)/(3),~~h=2.

Therefore, the VOLUME of the given rectangular prism is

A=bh=(22)/(3)*2=(44)/(3)=14(2)/(3).

Thus, the required volume of the given rectangular prism is 14(2)/(3)~\textup{cubic units}.
14 2/3

How:

7 1/3 times 2 is 14 2/3

What fraction is greater than 0.7 but less than 0.71

Answers

Are there any answer choices because this question has multiple answers.

Place these numbers on the number line. 1/4, 2/3, 3/4, 6/8__________________________________________________________________________

Answers

The best way to put them into a number line is to make sure that they've all got the same denominator, which in this case, will be 24, as this is the lowest common multiple of 3,4 and 8. You will then need to multiply these fractions accordingly. The first one (1/4) will need to be multiplied by 6 to get a denominator of 24, so this will then give you a result of 6/24. The second one (2/3), will need to be multiplied by 8, which will then give you a result of 16/24. The third one (3/4)will also need to be multiplied by 6, giving you 18/24. The final one (6/8) will need to be multiplied by 3, giving you 18/24. You will then need to put these in order, which will be- 1/4, 2/3, 3/4, and 6/8.The alternative method is to turn these into decimals- 1/4 is equivalent to 25%, which is equal to 0.25. 2/3 is equivalent to 66.66%, which is equivalent to 0.66. 3/4 is equivalent to 75%, which is equal to 0.75. 6/8 is also equivalent to 75%, which is equal to 0.75, you can then easily line them up this way.Hope this has been able to help you
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