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Bad White [126]
3 years ago
10

Help please whats the answer

Mathematics
1 answer:
Ad libitum [116K]3 years ago
5 0
<h3>Answer:</h3>

12 students

<h3>Explanation:</h3>

40% earned a B; 20% earned an A, so (40%+20% =) 60% got a "B or better."

60% of 20 students is ...

... 60/100 × 20 students = 1200/100 students = 12 students

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An artist uses parallelogram-shaped decorative tiles to create a design. One tile is shown.
abruzzese [7]
You can break this into a compound figure or take the easier route by finding the area of a parallelogram. To do this, add the two bottom numbers to find the length of the base and multiply by the height to get 9.52
5 0
3 years ago
Find the value of k so that the graph of the equation has the given y-intercept. y = − 1 /3x + 5/6 k; b = −10
dimulka [17.4K]

i think k is 5 but if i am wrong srry hope it helped

7 0
4 years ago
Solve the linear inequality 4x−15&lt;17
rodikova [14]
4x-15∠=17
    +15    +15

4x=32
---  ---
4     4

x∠8


7 0
3 years ago
A breed of cattle needs at least 10 proteins and 8 fats units per day. Feed type I provides 6 protein and 2 fat units at $4 per
Vikki [24]
Let the number of bags of feed type I to be used be x and the number of bags of feed type II to be used be y, then:

We are to minimize:

C = 4x + 3y

subject to the following constraints:

6x+2y\geq10 \\  \\ 2x+3y\geq8 \\  \\ x\geq0,\ y\geq0

From the graph of the 4 constraints above, the corner points are (0, 5), (1, 2), (4, 0).

Testing the objective function for the minimum corner point we have:

For (0, 5):
C = 4(0) + 3(5) = $15

For (1, 2):
C = 4(1) + 3(2) = 4 + 6 = $10

For (4, 0):
C = 4(4) + 3(0) = $16.

Therefore, the combination that yields the minimum cost is 1 bag of type I feed and 2 bags of type II feed.
7 0
3 years ago
Can someone help me with system of equations?
umka21 [38]

#1)

Answer:

x=1 and y=12

Explanation:

y=5x+7

y=2x+10

This system should use substitution because the value of y is given in terms if x.

Substitution:

5x+7=2x+10

Solve:

3x=3

x=1

Substitute x to solve for y by plugging x into one if the original equations(doesn’t matter which one is used).

y=5x+7

y=5(1)+7

y=5+7

y=12

#2)

Answer:

x=-8 and y=2

Explanation:

y=2x+18

9y=-2x+2

This system also uses substitution. The value of y us already given in terms if c in the first equations, so we will substitute in the second equation.

Substitute:

9(2x+18)=-2x+2

Solve:

18x+162=-2x+2

20x=-160

x=-8

Now that we have the value if x, plug it into one of the original equations(doesn’t matter which equation) and substitute to find y.

y=2x+18

Substitute:

y=2(-8)+18

Solve:

y=-16+18

y=2

7 0
4 years ago
Read 2 more answers
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