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BaLLatris [955]
2 years ago
5

Please help! I don't understand this!! Solve using substitution:

Mathematics
1 answer:
Ilya [14]2 years ago
3 0
First you solve for y for the top equation, making the top equation become y=-3+5=x.
now we have to substitute that into 3x-8y=24.

that gives you 3x-8(-3+5x)=24
now you solve it for x, which is 0.
now you have to substitute 0 for x in the equation y=-3+5x, so it now becomes y=-3+5*0.
when you solve this for y, you get -3. this means your answer is y=-3 and x=0
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8 0
3 years ago
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5 0
3 years ago
If f:X is 3x + b and ff(2) = 12, find the value of b​
Tamiku [17]

Answer:

b =6

Step-by-step explanation:

Given

f(x) =3x + b

f(2) = 12

Required

Find b

f(2) = 12 implies that:

12 = 3 * 2 + b

12 = 6 + b

Collect like terms

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5 0
3 years ago
A video, originally priced at $15, is on sale for $5.50. What is the percent of decrease rounded to the nearest whole number?
Natasha2012 [34]
Step one: Subtract $15 - $5.50 = $9.50 
<span>Step two: divide $9.50 ÷ $15 = .633 (rounded) </span>
<span>Step three: Multiply .633 * 100 to change it to a percent. It becomes 63.3% (rounded) </span>
<span>The decrease is 63.33% </span>

<span>Proof: $15 * .63333 = $9.50 </span>
<span>Subtract $15 - $9.50 = $5.50

does this help??</span>
6 0
3 years ago
Read 2 more answers
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