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3 years ago

Which expression is equal to p+p+q+q+r+r

Mathematics

2 answers:

GrogVix [38]3 years ago

8 0

2p+2q+2r is equal to p+p+q+q+r+r

svp [43]3 years ago

7 0

2(p+q+r)
2p+2q+2r is fine, but it is long

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HELP Please <br> I don’t get it lol

weeeeeb [17]

Answer:

bxy and bac

Step-by-step explanation:

since line xy is parallel to ac the triangles are similar

8 0

3 years ago

For to 30-60-90 triangle below, the length of side AB is 52 cm.

Jlenok [28]

Answer:

Using 60°

Let side CB be x

Cos60= x/52

Cross multiply=

x= 52cos60

x= 26 <u>cm</u>

7 0

3 years ago

What is the lcm of 16, 24 and 40

ivann1987 [24]

The answer is 240

Explanation: The Least Common Multiple (LCM) is the smallest number that two or more numbers will divide into evenly. NOTE: to find LCM you first need to know how to find GCD.

First we will find LCM for first two numbers ( 16 and24 ).

Step 1: Find the GCD (Greatest Common Divisor ) of 16 and 24 which is 8.

Step 2: Multiply the numbers 16 and 24 together ( 16 * 24 = 384 )

Step 3: Divide the 384 with 8. (384/8 = 48)

So, the LCM of 16 and 24 is 48.

Now we will find the LCM of above result (48) and third number ( 40 ) using the same procedure.

The result of this part is 240

8 0

3 years ago

If ∆ABC ≅ ∆PQR ,then side AB corresponds to -------------------

serg [7]

By direct correspondence AB = PQ

7 0

3 years ago

Read 2 more answers

If the radioactive half-life of a substance is 20 days, and there are 5 grams of it initially. When will the amount left be 2 gr

Kobotan [32]

Answer: $26.4\ \text{days}$

Step-by-step explanation:

Given

Half life of radioactive substance is $T_{\frac{1}{2}}=20\ \text{days}$

Initial amount $A_o=2\ \text{days}$

Amount left at any time is given by

$\Rightarrow A=A_o2^{\dfrac{-t}{T_{\frac{1}{2}}}}\\\\\Rightarrow 2=52^{\dfrac{-t}{20}}\\\\\Rightarrow 0.4=2^{\dfrac{-t}{20}}\\\\\Rightarrow 2^{\dfrac{t}{20}}=2.5\\\\\Rightarrow \dfrac{t}{20}\ln 2=\ln (2.5)\\\\\Rightarrow t=\dfrac{20\ln (2.5)}{\ln 2}\\\\\Rightarrow t=26.4\ \text{days}$

It takes 26.4 days to reach 2 gm.

7 0

3 years ago