3 years ago

Which is the better buy A)10 penceis for 50cents B)6 penciels for 2.70

Mathematics

2 answers:

kykrilka [37]3 years ago

6 0

That one i believe would be A

Vladimir [108]3 years ago

4 0

It is better to buy 10 pencils or 50 cents

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Plss help!<br>Question: Find a,b and c

Roman55 [17]

Answer:

See below, please

Step-by-step explanation:

The right：

${(y + c)}^{2} - b \times (x + a) \\ = ( {y}^{2} + 2yc + {c}^{2} ) - bx - ba =$

$= {y}^{2} - bx + 2cy + {c}^{2} - ab$

The left:

$= {y}^{2} - 7x - 18y + 109$

So, after comparing the right side and the left side of this equation, we know

$b = 7$

$2c = - 18 \\ so \\ c = - 9$

${c}^{2} - ab = 109$

So,

$a = \frac{ {c}^{2} - 109}{b} = \frac{ { (- 9)}^{2} - 109}{7} = \frac{ - 28}{7} = - 4$

6 0

3 years ago

Jackson is two times older than Shelly. If the sum of their ages is 18, how old is Jackson?

salantis [7]

Answer: jackson is 12

explanation:
let the age be represented by x
jackson is 2 times older than shelly so
2x is jackson’s age and x is shelly’s age

since the sum of their ages is 18 then:
2x + x = 18

solve:
3x = 18 ➔ divide by 3 on both sides
x = 6

so now we know shelly is 6

jackson is 2 times older than her so:
2(6) = 12

6 0

3 years ago

Read 2 more answers

The baker pays $0.50 per pound for sugar and $0.75 per pound for butter. Write an expression that shows how much the baker will

stiks02 [169]

.5(20)+.75(6)=$14.50

3 0

3 years ago

Read 2 more answers

Does anybody know how to solve this?

zalisa [80]

Pretty it is really good