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3 years ago

Please explain this is math homework

Mathematics

1 answer:

Ahat [919]3 years ago

7 0

Answer:

use math-way. it helps a lot !

Step-by-step explanation:

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9x + 3 = 9x + 7 in pre algebra

Gemiola [76]

Answer: no solution

Reason: the 9x on one side cancels out the other, and 3 is not equal to 7.

3 0

3 years ago

The sum of two numbers is -23, and the difference of the larger and the

geniusboy [140]

The two numbers are 29 and -52

Further explanation:

Let x be the larger number

and

y be the smaller number

then according to given statements

$x+y = -23\\x-y=81$

Adding both equations

$x+y+x-y=-23+81\\2x=58\\\frac{2x}{2} =\frac{58}{2}$

$x=29$

Putting x = 29 in first equation

$29+y=-23\\y=-23-29\\y=-52$

Proof:

Putting the values of x and y in first equation

$29-52=-23\\-23=-23$

So, The two numbers are 29 and -52

Keywords: Linear equations in two variables, Elimination method

Learn more about linear equations at:

#LearnwithBrainly

7 0

3 years ago

I badly want the answer to these☠️

Vedmedyk [2.9K]

Step-by-step explanation:

1. 4/10 + 15/10

The two fractions have like denominators so you can add the numerators.

Then:

4+15/10=19/10

This fraction cannot be reduced.

The fraction

19/10

is the same as

19÷10

Convert to a mixed number using

long division for 19 ÷ 10 = 1R9, so

19/10=19/10

Therefore:

4/10+15/10=1 9/10

2. 50/20+60/20=5 1/2

3. $\sf \frac{60}{40} + \frac{80}{40} = 3 \frac{1}{2}$

4. $\sf\frac{90}{60} + \frac{80}{60} = 2 \frac{5}{6}$

5. $\sf \frac{120}{40} + \frac{80}{40} = 5$

6. $\sf \frac{120}{40} + \frac{140}{40} = 6 \frac{1}{2}$

7. $\sf \frac{110}{70} + \frac{40}{70} = 2 \frac{1}{7}$

8. $\sf \frac{45}{5} + \frac{60}{5} = 21$

5 0

2 years ago

Solve the system of equations 8x + 5y = 24 Y= -4x

Rainbow [258]

Answer:

it’s 5.

Step-by-step explanation:

source: just trust me bro

8 0

3 years ago

Read 2 more answers

Find the length of side BC. Give your answer to 3 significant figures.

Ksju [112]

Answer:

BC ≈ 19.4 cm

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos71° = $\frac{adjacent}{hypotenuse}$ = $\frac{AB}{BC}$ = $\frac{6.3}{BC}$ ( multiply both sides by BC )

BC × cos71° = 6.3 ( divide both sides by cos71° )

BC = $\frac{6.3}{cos71}$ ≈ 19.4 cm ( to 3 significant figures )

7 0

3 years ago