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2 years ago

What’s the multiple of 9 that adds to 8

Mathematics

1 answer:

quester [9]2 years ago

6 0

Answer:

-18 and 27

Step-by-step explanation:

-18 = 9 x -2

27 = 9 x 3

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Pavel [41]

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2 years ago

the length of diagonal of a rectangular field is 23.7 m and one of its sides is 18.8 m. find the perimeter of the field.

katen-ka-za [31]

Answer:

Approximately 66.4 Meters

Step-by-step explanation:

So we have a rectangle with a width of 18.8 meters and a diagonal with 23.7 meters. To find the perimeter, we need to find the length first. Since a rectangle has four right angles, we can use the Pythagorean Theorem, where the diagonal is the hypotenuse.

$a^2+b^2=c^2$

Plug in 18.8 for either a or b. Plug in the diagonal 23.7 for c.

$(18.8)^2+b^2=23.7^2\\b^2=23.7^2-18.8^2\\b=\sqrt{23.7^2-18.8^2} \\b\approx14.4 \text{ meters}$

Therefore, the length is 14.4 meters. Now, find the perimeter:

$P=2l+2w\\P=2(14.4)+2(18.8)\\P=66.4\text{ meters}$

7 0

2 years ago

Find sin(7pie/4) using exact values

rewona [7]

$sin( \frac{ 7\pi }{4} )=-sin(2 \pi - \frac{ 7\pi }{4} )=-sin \frac{ \pi }{4} =- \frac{1}{ \sqrt{2} }$

3 0

3 years ago

Find the percent of discount. Round to the nearest whole percent.

Margarita [4]

Answer:

Step-by-step explanation:

105.5x100/120=87.91so 100-88 = 22%

4 0

2 years ago

What is 12.496 rounded to a whole number. what is 2.90 rounded to a whole number

otez555 [7]

A whole number is a number that is whole as in 1,2,3,4,etc, they don’t have decimals. To find the whole number for these questions you must look at the places (hundreds, thousands, ten thousands.) I was always told a trick which is 4 or less let it rest, 5 or more let it sore. (Basically if it’s less than 4 then decrease it, if it’s higher than increase it.)

12.496 = 13
2.90 = 3

Your answers are 13 and 3.

7 0

3 years ago

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