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olchik [2.2K]
3 years ago
9

A test contains 35 questions worth a total of 100 points. There are seven-point questions and two-point questions. How many two-

point questions are there? How many seven point questions?
Assign two variables and equations. Please solve.
Mathematics
2 answers:
Marat540 [252]3 years ago
7 0
S=seven point
t=twopoint
s+t=35
7s+2t=100
solve
multiply first equation by -2 and add to secon dequation
-2s-2t=-70
7s+2t=100 +
5s+0t=30

5s=30
divide 5
s=6

6 seven point quesitons
LekaFEV [45]3 years ago
7 0

Answer:

okay dm me

Step-by-step explanation:

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Which pair of triangles can be proven congruent by SAS?
ivolga24 [154]

Answer:

Second option

Step-by-step explanation:

They have two congruent pairs of sides and one congruent pair of angles.

4 0
2 years ago
Calculate the interest paid when 4920 is invested at 13% p.a simple interest for eight years​
Jlenok [28]

Answer:

I'll setup the problem and you can do the calculations

Step-by-step explanation:

The formula for simple interest:

I = P*r*t

I = interest

P = principle or amount invested

r = interest rate per period (period is a year)

t = number of periods

P = 4920

r = .13

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if you have questions, send a comment

5 0
3 years ago
Someone, please help me with this question.
Viefleur [7K]

Answer:

C.  95°

Step-by-step explanation:

Sumplementary angles sum 180°

144° + a = 180°

a = 180° - 144°

a = 36°

121° + b = 180°

b = 180° - 121°

b = 59°

The sum of internal angles of a triangle is 180°

a + b + c = 180°

36° + 59° + c° = 180°

c° = 180° - (36°+59°)

c° = 180° - 95°

c° = 85°

then:

c + n = 180°

85° + n = 180°

n = 180° - 85°

n = 95°

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3 years ago
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pochemuha
He started with 92 stickers
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3 years ago
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