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solniwko [45]
3 years ago
14

OMG!!! I forgot what Order of Operations were! I need help....

Mathematics
2 answers:
SpyIntel [72]3 years ago
8 0
Think of PEMDAS, or Please Excuse My Dear Aunt Sally. Which is <span>Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction in that order.</span>
prisoha [69]3 years ago
4 0
Think of PEMDAS, or Please Excuse My Dear Aunt Sally. Which is Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction in that order.
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What is the rate and unit rate for 420 miles in 7 hours
lisabon 2012 [21]
\frac{420mi}{7h}=\frac{420}{7}\ mi/h=60\ mph
4 0
3 years ago
A Square was altered so that one side is increased by 9 inches in the other side is decreased by 2 inches.The area of the result
LekaFEV [45]

Let s represent the length of any one side of the original square.  The longer side of the resulting rectangle is s + 9 and the shorter side s - 2.

The area of this rectangle is (s+9)(s-2) = 60 in^2.

This is a quadratic equation and can be solved using various methods.  Let's rewrite this equation in standard form:  s^2 + 7s - 18 = 60, or:

s^2 + 7s - 78 = 0.  This factors as follows:  (s+13)(s-6)=0, so that s = -13 and s= 6.  Discard s = -13, since the side length cannot be negative.  Then s = 6, and the area of the original square was 36 in^2.

4 0
3 years ago
I’ll give brainliest if someone can explain that answer
Zanzabum

Answer:

no

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
the length of a tangent from a point a at distance 5 cm from the centre of the circle is 4 cm find the radius of the circle ​
Semenov [28]

The radius of the circle is 3 cm.

<u>Step-by-step explanation:</u>

Refer the attached diagram, the circle with centre O. In that given, AB is tangent given as 4 cm and distance of point from the circle, OA = 5 cm

As AB is tangent, OB (radius of circle) is perpendicular to AB (tangent at any point of circle). Therefore the angle of OBA is 90 degree.

Also, triangle OAB is a right angled triangle (refer attached diagram). By using Pythagoras theorem in right angled triangle,

             (\text {Hypotenuse})^{2}=(\text {Height})^{2}+(\text {Base})^{2}

             (O A)^{2}=(O B)^{2}+(A B)^{2}

Substitute the given values in the above expression, we get

             (5)^{2}=(O B)^{2}+(4)^{2}

             (O B)^{2}=25-16=9

Taking square root on both side, we get

              Radius of the circle, OB = 3 cm

5 0
3 years ago
A poll was taken of Hobby Middle School, 25 out of 30
nasty-shy [4]

Answer:

b

Step-by-step explanation:

7 0
3 years ago
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