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Leviafan [203]
3 years ago
8

Tim answered all the questions on his math test but got 101010 answers wrong. He received 444 points for every correct answer, a

nd there was no penalty for wrong answers. His score was 767676 points. Write an equation to determine the total number of questions (q)(q)(, q, )on Tim's math test.
Mathematics
1 answer:
GuDViN [60]3 years ago
5 0

Answer:

4(q - 10) = 76.

q = 28.

Step-by-step explanation:

Let the number of questions be q.

The number Tim got right is therefore q - 10 questions.

4(q - 10) = 76

4q - 40 = 76

4q = 116

q = 116/4

q = 28.

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What is the sum of the first 50 terms of the series 2 + 17 + 32 + 47+ ...?​
Alex

Answer:

\huge\boxed{18,475}

Step-by-step explanation:

The terms of this sum make the arithmetic sequence.

The fomula of a sum of <em>n</em> terms of an arithmetic sequence:

S_n=\dfrac{[2a_1+(n-1)d]\cdot n}{2}

We have

a_1=2\\d=17-2=32-12=47-32=15\\n=50

Substitute:

S_{50}=\dfrac{[2\cdot2+(50-1)\cdot15]\cdot50}{2}=(4+49\cdot15)\cdot25=(4+735)\cdot25\\\\=739\cdot25=18,475

3 0
3 years ago
Evaluate the variable expression when a = 5, b = 5, and c = -4.<br> Bc divided by (2a)
zlopas [31]

Answer:

-2

Step-by-step explanation:

Bc÷2a

5×-4÷2×5

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-2

6 0
3 years ago
Read 2 more answers
1.
Komok [63]

Answer:

Future amount (A) = $1,258.77 (Approx)

Step-by-step explanation:

Given:

Amount deposit (p) = $693

Rate of interest monthly (r) = 4.9% / 12 = 0.003833

Number of month (n) = 13 × 12 = 156

Find:

Future amount (A)

Computation:

A = p [1+r]^n \\\\ A = 693 [1+0.003833]^{156}\\\\ A= 693[1.8163]\\\\ A = 1258.77

Future amount (A) = $1,258.77 (Approx)

6 0
3 years ago
Which table shows the correct methods used to justify the solution steps?
EleoNora [17]

Answer:

x = 8

Step-by-step explanation:

Step 1 : Simplify the equation

3(x-5) + 7x = 65

3x - 15 + 7x = 65

Step 2 : Make x the subject

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8 0
3 years ago
Read 2 more answers
Theres one more page ​
rusak2 [61]
6) x=-2
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2 years ago
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