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inessss [21]
3 years ago
11

Tenho que compra lápis e canetas. Se comprar sete lápis e três canetas, gastarei R$16,50. Se comprar cinco lápis e quatro caneta

s, gastarei R$15,50. Qual o preço de cada lápis e de cada caneta?
Mathematics
1 answer:
pentagon [3]3 years ago
7 0
In American: I have to buy pencils and pens. If I buy seven pencils and three pens, I'll spend $ 16.50. If I buy five pencils and four pens, I'll spend $ 15.50. What is the price of each pencil and pen?
Idk the answer
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Three improper fractions for 4 1/2
Brut [27]
9/2, 18/4,  27/6  you just make a equivalent fraction then multiply the whole number by the denominator and add the numerator
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3 years ago
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Solve the equation, justify<br> each step with an algebraic<br> property.<br> 7 = 16 + 3x
GenaCL600 [577]
7= 16 + 3x
7-16 = 3x
-9 = 3x
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5 0
3 years ago
PLLEASEEEE ANSWER HURRY
Galina-37 [17]
The answer is y=-8 I’m pretty sure
6 0
3 years ago
Can someone please explain how to do these?
Pani-rosa [81]

Answer:

<u>First question answer:</u> The limit is 69

<u>Second question answer:</u> The limit is 5


Step-by-step explanation:

For the first limit, plug in x=8 in the expression (9x-3), that's the answer for linear equations and limits.

So we have:

9x-3\\9(8)-3\\72-3\\69

The answer is 69


For the second limit, if we do same thing as the first, we will get division by 0. Also indeterminate form, 0 divided by 0. Thus we would think that the limit does not exist. But if we do some algebra, we can easily simplify it and thus plug in the value x=1 into the simplified expression to get the correct answer. Shown below:

\frac{x^2+8x-9}{x^2-1}\\\frac{(x+9)(x-1)}{(x-1)(x+1)}\\\frac{x+9}{x+1}

<em>Now putting 1 in x gives us the limit:</em>

\frac{x+9}{x+1}\\\frac{1+9}{1+1}=\frac{10}{2}=5

So the answer is 5

3 0
3 years ago
Draw a line representing the "rise" and a line representing the "run" of the line. State the slope of the line in simplest form.
Oduvanchick [21]

Answer:

go up 1 from 9x and left 2

Step-by-step explanation:

-1/2 is the slope of the line

up means pos

right means pos

down means neg

left means neg

5 0
2 years ago
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