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professor190 [17]
2 years ago
7

Ection 1

Mathematics
1 answer:
andreev551 [17]2 years ago
5 0
60 minutes is how long it will take her , because she has four walls 20•4 is 60
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Ivanna received a $90 gift card for a coffee store. She used it in buying some coffee that cost $7.68 per pound. After buying th
True [87]

Answer:

3 pounds

u have to use y=mx+b

90=7.68x+66.96

subtract the 66.96 from the 90

then just divide

6 0
3 years ago
mckenna and lara work for their uncle eddie, who repairs skateboards and bicycles. uncle eddie is leaving for a vacation to the
juin [17]

The <em><u>correct answer</u></em> is:

15 bicycles and 6 skateboards.

Explanation:

Let x represent the number of bicycles and y represent the number of skateboards.  The first equation in our system is then

x+y = 21, since there are 21 total items in the shop.

Each bicycle has 2 tires and each skateboard has 4; this gives us the equation

2x+4y=54 (because they are ordering 54 tires).

This makes our system

\left \{ {{x+y=21} \atop {2x+4y=54}} \right.

We will use elimination to solve this; we first need one of the variables to have the same coefficient in both equations.  We will make x the same, and we will do this by multiplying the first equation by 2:

\left \{ {{2(x+y=21)} \atop {2x+4y=54}} \right.  \\&#10;\\\left \{ {{2x+2y=42} \atop {2x+4y=54}} \right.

Now we will subtract the second equation from the first one:

\left \{ {{2x+2y=42} \atop {-(2x+4y=54)}} \right.  \\&#10;\\-2y=-12

Divide both sides by -2:

-2y/-2 = -12/-2

y = 6

There were 6 skateboards.  Substituting this into the first equation,

x+6 = 21

Subtract 6 from each side:

x+6-6 = 21-6

x = 15

There were 15 bicycles.

3 0
3 years ago
Someone pleaseee help♡ <br><br> Graph y &lt; 1 - 3x
Lynna [10]

Bottom right

The one with the dotted line and the shading on the left

3 0
3 years ago
Please help me with this​
kolbaska11 [484]

Answer:

c

Step-by-step explanation:

but its a negative 2 so but it would be 4 times 2 its 4 times negative 4

3 0
3 years ago
If n is a positive even number, then the product of (-12)ⁿ will be what
kipiarov [429]

Answer:

a positive even number.

Step-by-step explanation:

I suggest plugging in random positive even numbers and finding a pattern. (-12)^2 = 144. (-12)^ 4= 20,736. this is because two negatives, when multiplied, turn to a positive. the n is how many times negative 12 is multiplied with itself

3 0
3 years ago
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