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4 years ago

I need someone to Solve this equation with a substitution method only

Mathematics

1 answer:

nikklg [1K]4 years ago

3 0

Answer:

X=1

Step-by-step explanation:

1. Since y equals both 2x+5 and 4x+5, you can substitute 2x+5 for y into the first equation.

2. You then have 2x+5=4x+3

3. Then, solve the equation

4. 5=2x+3 (Subtract 2x from both sides)

5. 2=2x (Subtract 3 from both sides)

6. x=1 (Divide both sides by 2)

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Help me with the one at the top of the photo<br> Sorry is is bad quality!

lions [1.4K]

The answer is B. When you cross multiply it, it doesn't make sense like the rest of them;

A. 1x24= 24
4x6=24
24=24

B. 4x10=40
7x7=49
40 ≠ 49

C. 16x3=48
24x2=48
48=48

D. 36x5=180
10x18=180
180=180

7 0

3 years ago

Anyone wanna rp?? pretty bored ;-;

lakkis [162]

Answer:

rp? define plz

Step-by-step explanation:

i be st. upid, Lol

I'm bored too, what's up?!

3 0

3 years ago

Read 2 more answers

ΔABC is an equilateral triangle. m∠A = (3x - 12)°. Solve for x

dsp73

3x-12=60°
3x-12+(12)=60+(12)
3x=72
3x÷(3)=60÷(3)
x=24

8 0

3 years ago

Read 2 more answers

Please help me with this Algebra I question.

horrorfan [7]

Answer:

$-\dfrac{b^2}{16a^4}$

Step-by-step explanation:

Given expression:

$\dfrac{(2a)^{-2}b^5}{-4a^2b^3}$

$\textsf{Apply the exponent rule}\quad (ab)^c=a^c \cdot b^c:$

$\implies \dfrac{2^{-2}a^{-2}b^5}{-4a^2b^3}$

Separate the variables:

$\implies \dfrac{2^{-2}}{-4}\cdot \dfrac{a^{-2}}{a^2}\cdot \dfrac{b^5}{b^3}$

$\textsf{Apply the exponent rule} \quad \dfrac{a^b}{a^c}=a^{b-c}:$

$\implies \dfrac{2^{-2}}{-4}\cdot a^{-2-2}\cdot b^{5-3}$

$\implies \dfrac{2^{-2}}{-4}\cdot a^{-4}\cdot b^{2}$

$\textsf{Apply the exponent rule}\quad a^{-n}=\dfrac{1}{a^n}:$

$\implies \dfrac{1}{-4(2^2)}\cdot \dfrac{1}{a^4}\cdot b^{2}$

$\implies -\dfrac{1}{16}\cdot \dfrac{1}{a^4}\cdot b^{2}$

Simplify:

$\implies -\dfrac{b^2}{16a^4}$

5 0

2 years ago

Ethan’s dad is five years younger than four times Ethan’s age a write an algebraic expression that represents the age of Ethan’s

timofeeve [1]

Answer:

y=4x-5

Step-by-step explanation:

Let

y -----> Ethan’s dad age

x ----> Ethan’s age

we know that

The algebraic expression that represents the age of Ethan’s dad is equal to

y=4x-5

6 0

3 years ago