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Leokris [45]
3 years ago
14

15 - (-7) = ?? Please help if you know the answer can you maybe show work or explane how you got the answer thank you :)

Mathematics
1 answer:
Lena [83]3 years ago
5 0

Answer:

22

Step-by-step explanation:

since a negative times a negative equals a postive the equation becomes 15+7 which is 22

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Find the height of the lamppost to the nearest inch.
diamong [38]
<h3>The height of lamp post to nearest inch is 110 inches</h3>

<em><u>Solution:</u></em>

We have to find the height of lamppost

From the figure in question,

Given is a right angled triangle

Where,

base = 40 inches

height = ?

By definition of tan,

tan\ 70 = \frac{opposite}{base}\\\\tan\ 70 = \frac{height}{40}\\\\height = tan\ 70 \times 40\\\\height = 2.7474 \times 40\\\\height = 109.89 \approx 110

Thus height of lamp post to nearest inch is 110 inches

7 0
3 years ago
Y/7 +6=11 two step Equation
Dima020 [189]

Answer:

                  y = 35

Step-by-step explanation:

Step  1  :

           y

Simplify   —

           7

Equation at the end of step  1  :

  y          

 (— +  6) -  11  = 0

  7          

Step  2  :

Rewriting the whole as an Equivalent Fraction :

2.1   Adding a whole to a fraction

Rewrite the whole as a fraction using  7  as the denominator :

        6     6 • 7

   6 =  —  =  —————

        1       7  

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

2.2       Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

y + 6 • 7     y + 42

—————————  =  ——————

    7           7  

Equation at the end of step  2  :

 (y + 42)    

 ———————— -  11  = 0

    7        

Step  3  :

Rewriting the whole as an Equivalent Fraction :

3.1   Subtracting a whole from a fraction

Rewrite the whole as a fraction using  7  as the denominator :

         11     11 • 7

   11 =  ——  =  ——————

         1        7  

Adding fractions that have a common denominator :

3.2       Adding up the two equivalent fractions

(y+42) - (11 • 7)     y - 35

—————————————————  =  ——————

        7               7  

Equation at the end of step  3  :

 y - 35

 ——————  = 0

   7  

Step  4  :

When a fraction equals zero :

4.1    When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

 y-35

 ———— • 7 = 0 • 7

  7  

Now, on the left hand side, the  7  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

  y-35  = 0

Solving a Single Variable Equation :

4.2      Solve  :    y-35 = 0

Add  35  to both sides of the equation :

                     y = 35

One solution was found :

                  y = 35

8 0
3 years ago
Sarah went to the farmers market because she needed 5 more apples for her Granny’s jam recipe. The recipe calls for 32 apples. H
Evgesh-ka [11]
Well you do 32-5, which would equal 27 apples before she went to the farmers market. a variable would be 32. and an equation for this scenario would be 32=X+5
8 0
3 years ago
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PLS HELP I'LL MARK BRAINLEST
bezimeni [28]

Answer: C

Step-by-step explanation:

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6 0
3 years ago
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Answer please. Need help I'm giving a follow, a thanks, and a brainliest.
GalinKa [24]

16.5

Add the data set together and then divide by 5, or how many numbers are in the data set

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