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3 years ago

What statement makes the open sentence 49-7x=21 true?

1 answer:

5 0

If the question is asking what x equals then I believe the answer is x=4 because if you replace x with 4 and multiply them, you end up with 49-28 which equals 21

Hope this helps! :))

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If y-3x=9, 7x+y=25, what is the value of x and y?

lianna [129]

$\bold{\rm{Given}}\text{ : If y - 3x = 9, 7x + y = 25, what is the value of x and y}?$

$\bold{\rm{Solution}} \text{: We'll solve this by substitution method}$

$\dashrightarrow y - 3x = 9 \\ \\ \dashrightarrow \boxed{y = 9 + 3x } \qquad .. \sf eq(1)$

$\text{we got the value of y now getting the value of x}$

$\looparrowright 7x + y = 25 \\ \\ \looparrowright 7x = 25 - y \\ \\ \looparrowright \boxed{x = \frac{25 - y}{7}} \qquad .. \sf eq(2)$

$\text{Now, putting y = 9 + 3x in eq(2)}$

$\hookrightarrow x = \frac{25 - y}{7} \\ \\ \hookrightarrow x = \frac{25 - 9 + 3x}{7} \\ \\ \hookrightarrow 7x = 25 - 9 + 3x \\ \\ \hookrightarrow 7x - 3x = 16 \\ \\ \hookrightarrow 4x = 16 \\ \\ \hookrightarrow x = \frac{16}{4} \\ \\ \star \quad \boxed{ \green{ \frak{ x = 4}}}$

$\text{Now we know the value of x, for getting y we need to put x in eq(1)}$

$: \implies y = 9 + 3x \\ \\ : \implies y = 9 + 3(4) \\ \\ : \implies y = 9 + 12 \\ \\ \star \quad \boxed{\frak{ \green{y = 21}}}$

$\text{Hence, values of x and y are} \: \frak{ \green{4}} \: \text{and} \: \frak{ \green{21}} \: \text{respectively}.$

4 0

2 years ago

If two angles are supplementary and one angle measures 47°, what is the measure of the other angle? 43° 133° 53° 47°

Rama09 [41]

Answer:

x = 133

Step-by-step explanation:

Supplementary angles add to 180 degrees. Call the unknown angle x

47 +x = 180

Subtract 47 from each side

47-47+x =180-47

x = 133

3 0

3 years ago

Read 2 more answers

Which of the following is the equation 6^4 = 1,296 written in logarithmic form?

masya89 [10]

Given $6^4 = 1,296$

To write in logarithmic form we convert exponential form to logarithmic form

We apply the following rule

$b^x = a$ can be written as $log_b(a) = x$

here b = 6 , x=4 and a = 1296

$6^4 = 1,296$ can be written as $log_6(1,296) = 4$

option A is correct

8 0

3 years ago

Read 2 more answers

If prizes for a Carnival are priced at 5 for 80 cents how much wood to 50 prizes cost

Sedaia [141]

Answer:

Step-by-step explanation:

If 5 prizes cost 80 cents that means that 1 prize costs 16 cents because 80 divided by 5 = 16. And to get the cost of 50 prizes you do 16(50) = 800 cents. There are 100 cents in a dollar, giving you $8

5 0

3 years ago

Help choose if you do i will give branlest to right answer

kodGreya [7K]

EGA and AGB aka the fourth option

Step-by-step explanation:

EGA and AGB create a 180 degree angle together

7 0

2 years ago