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Usimov [2.4K]
3 years ago
5

How do you know (2,1) is a solution to 4x +y=9

Mathematics
2 answers:
VARVARA [1.3K]3 years ago
8 0

4x+y=9

4(2)+(1)=9

8+1=9

9=9

It is a solution

Rashid [163]3 years ago
8 0

Answer:

9=9

Step-by-step explanation:

Solution:

x = 2

y = 1

4x+y=9

4(2) + (1)=9    (here 4 and 2 are multiplying with each other, so 4x2= 8)

8+1=9

9=9

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How many 3/4s are in 3 2/4
MArishka [77]

Answer:

the answer is 3

Step-by-step explanation:

First change the whole number (3) to quaters or fraction

3x \frac{4}{4} = \frac{12}{4}

Now, add

\frac{2}{4} + \frac{12}{4} = \frac{14}{4}   Since, we have the same common denominator

now divide

14÷4 =3.5 = 3\frac{2}{4}

Therefore, there are 3 of 3/4 with a remainder of  \frac{2}{4} in 3 \frac{2}{4}.

7 0
3 years ago
Which should be the first step in solving the equation 1.2w-3.8=12.4
zaharov [31]

Answer:

+3.8 to each side

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
60 POINTS PLEASE HELP ITS URGENT 1. Write a quadratic equation that can be solved by factoring. Solve your equation and show and
Vika [28.1K]

you have a quadratic equation that can be factored, like x2+5x+6=0.This can be factored into(x+2)(x+3)=0.

So the solutions are x=-2 and x=-3.

2. 

<span><span>1. Try first to solve the equation by factoring.  Be sure that your equation is in standard form (ax2+bx+c=0) before you start your factoring attempt.  Don't waste a lot of time trying to factor your equation; if you can't get it factored in less than 60 seconds, move on to another method.
</span><span>2. Next, look at the side of the equation containing the variable.  Is that side a perfect square?  If it is, then you can solve the equation by taking the square root of both sides of the equation.  Don't forget to include a ± sign in your equation once you have taken the square root.
3.</span>Next, if the coefficient of the squared term is 1 and the coefficient of the linear (middle) term is even, completing the square is a good method to use.
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5 0
3 years ago
Read 2 more answers
Asap help please on this question thanks
Rina8888 [55]
90-30=60 Hoped this helped
3 0
3 years ago
What interest is needed to earn $137.50 on a deposit of $500 for five years if it earns simple interest?
sineoko [7]

Answer:

5.5%

Step-by-step explanation:

Given data

Simple interest =  $137.50

Principal= $500

time = 5 years

We want to find the rate  R

Simple interest= PRT/100

137.50 = 500*R*5/100

137.50=2500R/100

cross multiply

137.5*100= 2500R

13750= 2500R

divide both sides by 2500

R= 13750/2500

R=5.5%

Hence the rate is 5.5%

4 0
3 years ago
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