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iren2701 [21]
2 years ago
8

7 x 28 =(20+ )=40+ =

Mathematics
1 answer:
solmaris [256]2 years ago
5 0
The answer is 256 to 7 x 28=(20+ )=40+=
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lapo4ka [179]

Answer:

1:1

Step-by-step explanation:

They look exactly the same so they would equal each other

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3 years ago
Taylor has 16 tacks. she buys 2 packages of 36 tacks. how many gate sale posters can she put up if she uses 4 tacks for each pos
Gemiola [76]


She can Hang up 4 posters. Because Taylor only has 16 tacks.

16/4=4

4 0
3 years ago
Solve this equation for x: 2x^2 + 12x - 7 = 0
zhannawk [14.2K]

Answer:

x=0.5355 or x=-6.5355

First step is to: Isolate the constant term by adding 7 to both sides

Step-by-step explanation:

We want to solve this equation: 2x^2 + 12x - 7 = 0

On observation, the trinomial is not factorizable so we use the Completing the square method.

Step 1: Isolate the constant term by adding 7 to both sides

2x^2 + 12x - 7+7 = 0+7\\2x^2 + 12x=7

Step 2: Divide the equation all through by the coefficient of x^2 which is 2.

x^2 + 6x=\frac{7}{2}

Step 3: Divide the coefficient of x by 2, square it and add it to both sides.

Coefficient of x=6

Divided by 2=3

Square of 3=3^2

Therefore, we have:

x^2 + 6x+3^2=\frac{7}{2}+3^2

Step 4: Write the Left Hand side in the form (x+k)^2

(x+3)^2=\frac{7}{2}+3^2\\(x+3)^2=12.5\\

Step 5: Take the square root of both sides and solve for x

x+3=\pm\sqrt{12.5}\\x=-3\pm \sqrt{12.5}\\x=-3+ \sqrt{12.5}, $ or $x= -3- \sqrt{12.5}\\$x=0.5355 or x=-6.5355

6 0
3 years ago
Wesley can use the equation y=3x to calculate how far he has walked, where y represents the number of miles walked, and x repres
arlik [135]

16.5/3 = 5.5

Step-by-step explanation:

becuase he needs to walk 16.5 miles. and he can walk 3 miles per x(hour)

you need to devide distance by speed to get time.

5 0
2 years ago
During 4 days, the price of the stock of PEV Corporation went up 1/4 of a point, down 1/3 of a point, down 3/4 of a point, and u
HACTEHA [7]

The price of the stock of PEV Corporation varies as shown. we have to determine the net charge. Net change is just how much it changed overall, so we will look for all the ups minus all the downs.  

Here, "went up" goes with a + sign, and "went down" goes with a - sign.

So, Net charge = \frac{1}{4} - \frac{1}{3}-\frac{3}{4} + \frac{7}{10}

= \frac{1}{4}-\frac{3}{4}- \frac{1}{3} + \frac{7}{10}

= -\frac{2}{4}- \frac{1}{3} + \frac{7}{10}

= -\frac{1}{2}- \frac{1}{3} + \frac{7}{10}

LCM of 2,3 and 10 is 30

= \frac{-15-10+21}{30}

= \frac{-4}{30}

= \frac{-2}{15}

So, the net charge is \frac{-2}{15}

8 0
2 years ago
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