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Marina86 [1]
3 years ago
9

Your teacher is giving you a test worth 100 points containing 40 questions. There are two‐point and four‐point questions on the

test. How many of each type of question are on the test?
Mathematics
2 answers:
Mumz [18]3 years ago
5 0
Since we're looking for x and y, we can set up a system of equations.
x + y = 40
2x + 4y = 100
Let's try 20 for x and 20 for y.
20 + 20 = 40
2(20) + 4(20) =40 + 80, nope.
Let's try 30 for x and 10 for y.
30 + 10 = 40
2(30) + 4(10) = 60 + 40, yes!
x (2 pt) = 30
y (4 pt) = 10
I hope this helps!
Arisa [49]3 years ago
3 0
30 questions worth 2 points, and 10 questions worth 4 points.
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Two statements are missing reasons. What reasons can be used to justify both statements 2 and 3 ?
nataly862011 [7]

Answer:

See explanation

Step-by-step explanation:

The given circle has center O.

A, B,C, and D are points on the circumference of the circle.

We want to prove that: \angle A\cong \angle D

We need to join to B and C as shown in the attachment.

Recall that angle subtended by arc BC at the center is twice the angle subtended at the circumference by the same arc.

This implies that:

\angle O=2\angle A...(1)

\angle O=2\angle D...(2)

The LHS of equation (1) and (2) are equal. Therefore the RHS are also equal.

This implies that:

2\angle A=2\angle D

\therefore \angle A\cong \angle D

4 0
3 years ago
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Mkey [24]

Answer:

1-5n

Step-by-step explanation:

you would do 1-5n because its in brackets, the order of opperation is

Brakcets

Order (Power ofs)

Division and Mulitplication

then do addition and subtraction

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3 years ago
How can bar diagrams be used to model numerical expressions
vesna_86 [32]
A bar diagram can be used to represent algebraic expressions or to give examples.
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2 years ago
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What is the slope of line which goes through the points (-2,-1) and (2,3)?
Nat2105 [25]

Answer:

1

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

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6 0
3 years ago
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PLZ HELP! Lenny is 3 times older than Max. When you subtract Max’s age from Lenny’s age, you get 24. How old is Lenny and how ol
tresset_1 [31]
Hi!

(l = Lenny
m = Max)

Lenny is 3 times as old as Max.
3m = l

When you subtract Max's age from Lenny's age, you get 24.
L - m = 24

Put in the value of l.
3m - m = 24
There is our equation.

Now solve

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3 * 12 = l
36 = l

The equation is 3m - m = 24
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Hope this helps! :)
-Peredhel
6 0
2 years ago
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