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kipiarov [429]
3 years ago
6

Help please on these thanks

Mathematics
1 answer:
Alex Ar [27]3 years ago
5 0
It's pretty hard to see the photo, so please don't judge me if all the answers/some answers are right...

1)
- angle o?= 42 degrees (alternate interior angles are congruent)
- angle t= 138 degrees (linear pair, so 180-42=138)
2)
-h= 112 degrees  (same side interior angles, so 180-68=112
-angle 9= 68 degrees (vertical angles are congruent)
3)
-angle i= 111 degrees (vertical angles are congruent)
-angle j= 69 degrees (linear pair, so 180-111=69)
4)
-angle l= 143 degrees (same side interior angles, so 180-37=143)
-angle k= 37 degrees (alternate interior angles are congruent)
-angle m= 37 degrees (vertical angles are congruent)
5)
-angle a= 130 degrees (alternate interior angles are congruent)
-angle b= 65 degrees (alternate interior angles are congruent)
6)
-angle a= 124 degrees (corresponding angles are congruent)
- angle b= 56 degrees (alternate interior angles are congruent)
7)
-angle a= 132 degrees (corresponding angles are congruent)
- angle b= 83 degrees (corresponding angles are congruent)
8)
- angle a= 74 degrees (alternate interior angles are congruent)
-angle b= 106 degrees (linear pair, so 180-74=106)
-angle c= 106 degrees (another linear pair, so...)
- angle d= 106 degrees (ANOTHER linear pair So...)
- angle e= 106 degrees (vertical angles are congruent)

<em>Please give me brainliest, and I also hope these answers helped somehow or another! Thank you and please ask me for anymore questions!</em>
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Using the following system of inequalities find the maximum value of f(x,y) = 3x + 7y
Aleksandr-060686 [28]
X ≥ 0
y ≥ 0
f(x, y) = 3x + 7y
f(0, 0) = 3(0) + 7(0)
f(0, 0) = 0 + 0
f(0, 0) = 0

3x + 2y ≤ 18 ⇒ 3x + 2y = 18 ⇒ 21x + 14y = 126
6x + 7y ≤ 42 ⇒ 6x + 7y = 42 ⇒ <u>12x + 14y =   84</u>
                                                              <u>9x</u> = <u>42</u>
                                                               9      9
                                                                x = 4²/₃
                                                      3x + 2y = 18
                                                3(4²/₃) + 2y = 18
                                                      14 + 2y = 18
                                                    <u>- 14         - 14</u>
                                                              <u>2y</u> = <u>4</u>
                                                               2     2
                                                                y = 2
                                                          (x, y) = (4²/₃, 2)
f(x, y) = 3x + 7y
f(4²/₃, 2) = 3(4²/₃) + 7(2)
f(4²/₃, 2) = 14 + 9
f(4²/₃, 2) = 23
4 0
4 years ago
What is the part and whole of 40% of 20?
pashok25 [27]
The answer is 8

I hope this helps!
5 0
3 years ago
01:59:13
BlackZzzverrR [31]

Correct Question:

Stan ran 4\frac{7}{10} miles, which was 1\frac{3}{10} fewer miles than Matt ran. Four students wrote and solved equations to find m, the number of miles that Matt ran. Which student wrote and solved the equation correctly?

Molly’s work:

M + 1\frac{3}{10} = 4\frac{7}{10}; M = 5\frac{10}{10} = 6.

Emma’s work:

M - 1\frac{3}{10} = 4\frac{7}{10}; M = 3\frac{10}{10} = 4

Alysa’s work:

M + 1\frac{3}{10} = 4\frac{7}{10}; M = 3\frac{4}{10} = 3 and two-fifths

Maddie’s work:

M - 1\frac{3}{10} = 4\frac{7}{10}; M = 5\frac{10}{10} = 6

Answer:

Molly's Work is correct

M + 1\frac{3}{10} = 4\frac{7}{10}; M = 5\frac{10}{10} = 6.

Step-by-step explanation:

Let S represent distance covered by Stan and M represent the distance covered by Matt;

Given that the distance covered by Stan is 4\frac{7}{10} miles and it is 1\frac{3}{10} miles less than that covered by Matt;

This can be represented mathematically as

S = M - 1\frac{3}{10}

By substituting 4\frac{7}{10} for S;

This gives

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

By collecting like terms

4\frac{7}{10} = M - 1\frac{3}{10} becomes

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

Reorder

M = 4\frac{7}{10} + 1\frac{3}{10} ---- This is the correct equation

Solving further to get the distance covered by Matt;

Split fraction

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

Collect like terms

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

M = 5 +  \frac{7}{10} + \frac{3}{10}

Add fraction (Take LCM)

M = 5 + \frac{7 + 3}{10}

M = 5 + \frac{10}{10}

Divide Fraction

M = 5 + 1

M = 6

Hence, the equation of the system is

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

and the solution is M = 6

Molly’s work is correct

7 0
3 years ago
A watermelon consists of 90% water and 10% pulp. After drying the weight is 20 kg
Anna [14]
Answer: 40kg

Explanation: If 40% water and 10% pulp (Total 50%) is 20kg
Then 90% water and 10% pulp (Total 100%) would be double, so therefore 40kg

To confirm: 10% = 4kg
40kg - 4kg = 36kg
to get from 90% to 40% just divide by 2.25
the answer is 16kg
add on the pulp weight of 4kg = 20kg
8 0
3 years ago
Read 2 more answers
L. x-5=7<br>2. 5y-21=14 <br>3. 2x+8=x-3<br><br><br>please help I need the full methods . ​
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Answer:

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4 0
3 years ago
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