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katovenus [111]
3 years ago
12

53b−7b−6b+1 if b=25 Please help me with this problem! And what is the simplified expression?

Mathematics
1 answer:
Nataly_w [17]3 years ago
7 0
You have to substitute 25 for b to simplify the expression.

53(25) -7(25) -6(25) +1
=1325 - 175 - 150 +1
=1001
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Izzie recently took a math test where each correct answer (a) on the main part of the test was worth 8.3 points. She also correc
Temka [501]

Answer:

12 correct answers

Step-by-step explanation:

Since in the main part she scores 8.3 points for each question she answers correctly, we can assume that the number of questions she answers correctly=a

Therefor, the total number of points she achieved in the math test in the main part alone can be expressed as:

Total score(main part)=8.3×a=8.3a points

She also solved a bonus question worth=11 points

Consider expression 1 below

The total score in the whole test=Total score in the main part+Bonus points, where;

Total score in the whole test=110.6 points

Total score in the main part=8.3a points

Bonus points=11 points

Substituting the values in expression 1:

8.3a+11=110.6

8.3a=110.6-11

8.3a/8.3=99.6/8.3

a=12

Number of correct answers in the main part=a=12

4 0
4 years ago
Find the sum of the first 63 terms of –19, -13, -7 …
Degger [83]

You can tell this is an arithmetic sequence because it is a list of terms beginning with -19 that increase by 6 each term. Because of this, we can use the formula for the sum of an arithmetic sequence, which is:

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

  • n is the number of terms in the sequence
  • a_1 is the starting term
  • d is the common difference among the terms

In this case, we can see that n = 63, a_1 = -19, and d = 6. Thus, we can use the formula:

S = \dfrac{63}{2} [2(-19) + 6(62)] = 10,521


Our answer is 10,521.


7 0
3 years ago
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JulsSmile [24]

Answer:

The answer is 3:1

Step-by-step explanation:

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4 years ago
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Answer:

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Step-by-step explanation:

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6 0
2 years ago
Read 2 more answers
Can some one please help me on math​
pav-90 [236]

Answer:

your answer is D

Step-by-step explanation:

\frac{3}{4} x-8=5.5

5 0
4 years ago
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