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Pie
2 years ago
5

Determine the missing number 420 + = 670 basically 420 + what = 670 so what equals 670 but has to include 420

Mathematics
2 answers:
Butoxors [25]2 years ago
5 0
You would take 420 away from 670 and be left with 250


So 670-420=250
So that means 250+420=670
Arada [10]2 years ago
4 0

Answer:

The answer is 250.

Step-by-step explanation:

Hello! This is a simple subtraction matter. All order-of-operations are opposites (multiplication and division, and addition and subtraction.) This means that since we're presented with a case where 420 + something = 670, the opposite is 670 - 420 = something.<em> </em>

If we compute some simple calculations, 670 - 420 = 250.

There's your answer :)

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If a triangle has side lengths 7, 10, and 12, is it a right triangle??
Vesnalui [34]

Answer:

No. Remember, a right angle must have a 90 degree angle. We can find the lengths with the Pythagorean Theorem.

Step-by-step explanation:

Given the length 7, 10, and 12, we can assume that 12 is the hypotenuse (it is the longest length).

- we can use 7 and 10 interchangeably.

Fill in the equation, a^2 + b^2 = c^2

                 where c = 12, and a or b = 7 or 10.

To indicate if the given lengths would form a right angle, we can only input 7 or 10, not both.

Therefore, 7^2 + b^2 = 12^2 or 10^2 + b^2 = 12^2

7^2 + b^2 = 12^2 ==> 49 + b^2 = 144 ==> <u>b= </u>\sqrt{95<u> ==> </u><u>9.746</u>

b= 9.7, not 10.

10^2 + b^2 = 12^2 ==> 100 + b^2 = 144 ==> <u>b = </u>\sqrt{44<u> ==> </u><u>6.633 </u>

b= 6.6, not 7.

Therefore, the lengths 7, 10, and 12, does NOT make a right triangle.

Hope this helps!

5 0
3 years ago
What is (56)(91)x -17
AVprozaik [17]
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8 0
3 years ago
4 3/4 ÷ 3=<br> Please help
Setler [38]

Answer:

1.58 is the answer

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Find the surface area of the prism.
Vanyuwa [196]

Answer:

400cm²

Step-by-step explanation:

Total surface area of a prism includes the area of the top and bottom triangle sides of the prism, plus the area of all 3 rectangular sides.

Base & Bottom triangle area: 2 x [(8 x 15)/2] = 120cm²

Side triangle area: 17 x 7 + 8 x 7 + 15 x 7 = 280cm²

Total surface area = 280 + 120 = 400cm²

4 0
3 years ago
Help plz i need help k
irga5000 [103]
What do you need help with?
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4 years ago
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