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Alexandra [31]
3 years ago
12

PLS HELP TELL WHETHER X AND Y SHOW DIRECT VARIATION!!!

Mathematics
1 answer:
jarptica [38.1K]3 years ago
4 0

Answer:

Try using this calculator

Step-by-step explanation:

https://www.mathpapa.com/algebra-calculator.html

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Two bowls and one cup weigh 800 grams. One bowl and two cups weigh 700 grams. Find the weight of the bowl and the cup
antoniya [11.8K]

Answer:

\large \boxed{\textbf{Bowl = 300 g; cup = 200 g}}  

Step-by-step explanation:

 Let b  = the mass of a bowl  

and c = the mass of a cup  

We have two conditions:  

\begin{array}{lrcl}(1) &2b + c  & = & 800\\(2) & b + 2c & = & 700\\\end{array}

Calculations:  

\begin{array}{lrcll}(3) & 4b + 2c &=  & 1600&\text{ Multiplied (1) by 2}\\& 3b & = & 900&\text{Subtracted (2) from (3)}\\(4) & b & = & \mathbf{300}&\text{Divided each side by 3}\\ & 600 + c & = & 800&\text{Substituted (4) into (2}\\ & c & = & \mathbf{200}\\\end{array}\\\text{The mass of a bowl  is $\large \boxed{\textbf{300 g}}$ and that of a cup is $\large \boxed{\textbf{200 g}}$}

Check:

\begin{array}{rlcrl}2(300) + 200& =800 & & 300 + 2(200) & = 700\\600 + 200 & = 800& & 300 + 400 & = 700\\800 & = 800& & 700 & = 700\\\end{array}

OK.

6 0
3 years ago
Sandy has $200 in her bank account
gayaneshka [121]

Answer:

200- (6*19.98)= x; 80.12

Step-by-step explanation:

Sandy has $200. From there, she wrote 6 $19.98 checks. To find what the balance is after you have to find the amount of money she wrote in total on the checks and then subtract it from the original balance in her bank account.

200- (6*19.98)= x

200- 119.88= x

80.12=x

Her account balance is $80.12

8 0
3 years ago
A spinner is divided into 10 equal parts and numbered from 1 through 10. What is the probability of spinning a number less than
r-ruslan [8.4K]
You can count from 6-10 and you would get c) 5/10
5 0
3 years ago
ASAP geometry true or false
KATRIN_1 [288]
True, it has a 90 degree angle. It’s clear as day. And the Pythagorean theorem works perfectly fine with the two legs and hypotenuse
4 0
4 years ago
In a science class, students water a plant with the same amount of water each day for 28 consecutive days. If the student use a
lilavasa [31]

Answer:

use a calculator

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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