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castortr0y [4]
3 years ago
6

142 equals 176 minus f

Mathematics
2 answers:
natulia [17]3 years ago
8 0

Answer:

f=34

Step-by-step explanation:

vaieri [72.5K]3 years ago
4 0

Answer:

can you be more clear?

Step-by-step explanation:

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A biology test is worth 100 points and has 36 questions.
Ad libitum [116K]

Answer:

(a) 7 essays and 29 multiple questions

(b) Your friend is incorrect

Step-by-step explanation:

Represent multiple choice with M and essay with E.

So:

M + E= 36 --- Number of questions

2M + 6E = 100 --- Points

Solving (a): Number of question of each type.

Make E the subject of formula in M + E= 36

E = 36 - M

Substitute 36 - M for E in 2M + 6E = 100

2M + 6(36 - M) = 100

2M + 216 - 6M = 100

Collect Like Terms

2M - 6M = 100 - 216

-4M = - 116

Divide both sides by -4

M = \frac{-116}{-4}

M = 29

Substitute 29 for M in E = 36 - M

E = 36 - 29

E = 7

Solving (b): Can the multiple questions worth 4 points each?

It is not possible.

See explanation.

If multiple question worth 4 points each, then

2M + 6E = 100 would be:

4M + xE = 100

Where x represents the number of points for essay questions.

Substitute 7 for E and 29 for M.

4 * 29 + x * 7 = 100

116 + 7x = 100

Subtract 116 from both sides

116-116 + 7x = 100 -116

7x = 100-116

7x = -16

Make x the subject

x = -\frac{16}{7}

Since the essay question can not have worth negative points.

Then, it is impossible to have the multiple questions worth 4 points

<em>Your friend is incorrect.</em>

6 0
2 years ago
If the probability of rain is 0.03 what is the probability of not rain
serious [3.7K]
0.97 because 1.00-.03=0.97
7 0
3 years ago
Read 2 more answers
55 percent of 48 is the same as 60 percent of what number? I WILL AWARD BRAINLEIST
mars1129 [50]

Answer:

Step-by-step explanation:

55% of 48 = 26.4

0%-------------------------------------60%------------100%

0                                             26.4

60x1.6~=100

26.4x1.6~=44

...55% of 48 is the same as 60% of 44

5 0
3 years ago
If 1 mile is equal to 1.6 kilometers, convert 50 kilometers to miles.
Free_Kalibri [48]
1 mile = 1.6 km
x = 50 × 1.6
x = 80 miles
4 0
3 years ago
What is the length of AC?
sashaice [31]

A is at -8 and C i5 at 5

-8 to 0 is 8 units and 0 to 5 is 5 units.

8 +5 = 13

AC is 13 units long.

3 0
3 years ago
Read 2 more answers
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