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4 years ago

EASY MATHS PLS HELP

Mathematics

2 answers:

Goshia [24]4 years ago

5 0

Answer:

The value of x is 5/4 and y is -5.

Step-by-step explanation:

Firstly, you have to make the 1st equation as (1) and make 2nd equation as (2).
Secondly, you have to elimimate one of the variable. I choose to eliminate x in order to get rid of x, I add (1) and (2) together as -4x+4x = 0.
Thirdly, you can solve the value of y. Then after getting y value, you can substitute y value into any equation. I choose to put y value into (1).
Lastly, you can solve the equation to get x value.
THE ANSWER IS OUT !!☝️☝️

Fofino [41]4 years ago

3 0

Answer:

(1.25, - 5 )

Step-by-step explanation:

Given the 2 equations

- 4x + 3y = - 20 → (1)

4x + 2y = - 5 → (2)

Adding the 2 equations term by term will eliminate the x- term

5y = - 25 ( divide both sides by 5 )

y = - 5

Substitute y = - 5 into either of the 2 equations and solve for x

Substituting into (2)

4x + 2(- 5) = - 5, that is

4x - 10 = - 5 ( add 10 to both sides )

4x = 5 ( divide both sides by 4 )

x = $\frac{5}{4}$ = 1.25

Solution is (1.25, - 5 )

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Answer:

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3 years ago

Which facts are true for the graph of the function below? Check all that apply.

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4 years ago

Read 2 more answers

I NEED THIS ANSWER ASAP!!!!

Naddik [55]

Solution:

We know the following rules:

Rule: If an exponent is negative, it will be in the fraction 1/nˣ.
Rule: If an exponent is positive, it will be in whole number form and will multiply itself m times.
Rule: if a number's exponent is 0, then the number is 1.

Now, let's solve each problem.

Question-7

4³ = 4 x 4 x 4 = 64
4² = 4 x 4 = 16
4¹ = 4
4⁰ = 1

Question-8

(-2)³ = (-2) x (-2) x -(2) = -8
(-2)² = (-2) x (-2) = 4
(-2)¹ = -2
(-2)⁰ = 1

Hoped this helped!

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2 years ago

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In a certain Algebra 2 class of 20 students, 8 of them play basketball and 7 of them play baseball. There are 8 students who pla

laila [671]

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4 years ago

In one semester, doug and Laura spent a combined 250 hours in the tutoring lab. If doug spent 40 more hours in the lab then Laur

aksik [14]

Answer:

Step-by-step explanation:

What we have is a general equation that says this in words:

Laura's hours + Doug's hours = 250 total hours

Since we don't know either person's number of hours, AND since we can only have 1 unknown in a single equation, we need to write Laura's hours in terms of Doug's, or Doug's hours in terms of Laura's. We are told that Doug spent Laura's hours plus another 40 in the lab, so let's call Laura's hours "x". That makes Doug's hours "x + 40". Now we can write our general equation in terms of x:

x + x + 40 = 250 and

2x = 210 so

x = 105

Since Laura is x, she worked 105 hours in the lab and Doug worked 40 hours beyond what Laura worked. Doug worked 145. As long as those 2 numbers add up to 250, we did the job correctly. 105 + 145 = 250? I believe it does!!

8 0

4 years ago

EASY MATHS PLS HELP​

EASY MATHS PLS HELP