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3 years ago

HELPP I HAVE 12 MINUTES LEFTT

Mathematics

2 answers:

Alecsey [184]3 years ago

5 0

Answer:

(see explanation)

Step-by-step explanation:

Rounding to whole numbers,

1.4 rounds to 1

4.1 rounds to 4.

1+1+4 = 6

However, if you're rounding to the nearest 0.5,

1.4 rounds to 1.5

4.1 rounds to 4.0

1.5 + 1.5 + 4.0 = 7

oee [108]3 years ago

4 0

Answer:

Step-by-step explanation:

When you need to estimate, if the number is .4 or below, bring it down (1.4 will now be 1.)

This goes for both 1.4

so, 1 + 1.

Next, you have 4.1 (which is also below .5, so .4 or below.)

It is 1 + 1 + 4.

That is 6. Hope this helps a bit ^^ :>

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3 years ago

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How do i use the decimals 2.47,9.57,and 7.1 to write two different addition facts and two different subtraction facts?

VARVARA [1.3K]

Answers

2.47 + 7.1 = 9.57

7.1 + 2.47 = 9.57

9.57 - 2.47 = 7.1

9.57 - 7.1 = 2.47

Explanation

A fact family is a group of math facts using the same numbers. In the case of addition/subtraction, you use three numbers and get four facts.

In this case we are going to write two different addition facts and two different subtraction facts as follows:

2.47,9.57,and 7.1

Addition facts

2.47 + 7.1 = 9.57

7.1 + 2.47 = 9.57

Subtraction

9.57 - 2.47 = 7.1

9.57 - 7.1 = 2.47

7 0

4 years ago

Please help me with the question ...thank u!

LiRa [457]

Answer:

Step-by-step explanation:

To solve this use the expression PEMDAS

So first we do what is in parenthesis

-10 + 6 = -4

Then . .

225 / 5 = 45 + -4 = 41

√41 = 6.4 rounded to the tenth

round to the nearest whole number = 7

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2 years ago

If angle A =90 degree , b=1 cm and a =2 cm then solve the following right angled triangle ABC

Kruka [31]

Answer:

Angle A = 90 degrees, side a = 2.
Angle B = 30 degrees, side b = 1.
Angle C = 60 degrees, side c = $\sqrt{3}$ .

Side c:

If angle A is 90 degrees, side a is the hypotenuse.
$c^{2} + b^{2} = a^{2}$ <--- this is NOT the correct way to write the Pythagorean theorem. I changed it to fit the side lengths. Normally, it is $a^{2} + b^{2} = c^{2}$ , where c is the hypotenuse. Since a is the hypotenuse, I switched the variables.
$c^{2} + (1)^{2} = (2)^{2}$
$c^{2} + 1 = 4$
$c^{2} = 3$
$c = \sqrt{3}$

Finding the angles:

In a 30-60-90 right triangle, the...
Shortest leg = x
Longest leg = $x\sqrt{3}$
Hypotenuse = 2x
In this case, the shortest leg is 1, the longer leg is $\sqrt{3}$ (or $1*\sqrt{3}$ ), and the hypotenuse is 2 (or $2*1$ ).
As a result, this is a 30-60-90 triangle -- angle B is 30 degrees while angle C is 60 degrees.

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3 years ago