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Brut [27]
3 years ago
8

A math test is worth 100 points and has 30 problems. Each problem is worth either 3 points or 4 points. How many 4-point problem

s are there in the test ?
Mathematics
1 answer:
LiRa [457]3 years ago
6 0
I think there's 24 4-point probs
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-9/14+2/7 w explanation!!
mars1129 [50]

Answer:

-5/14

Step-by-step explanation:

When adding fractions, you need to have a common denominator, the bottom part of a fraction. Because one denominator is 14 and the other is 7, you must create a new denominator.

To create a new denominator, you can either reduce a fraction or multiply it by something, which is easier.

For this problem, we can convert 2/7's denominator into 14 instead of 7 by multiplying the fraction by 2/2:

<u>2</u>  x <u>2</u>  =  <u>4</u>

7     2   = 14

2/7 has now converted into 4/14. Now, we can easily add.

-9/14+4/14  This can be rewritten as something more understandable.

4/14-9/14    We are now subtracting.

-5/14            This cannot reduce, so it is our answer.

I hope this helps!! Have an amazing day and let me know if you want more explanation ;)

3 0
3 years ago
Bob needs to mix 2 cups of orange juice concentrate with 3.5 cups of water to make orange juice. bob has 6 cups of concentrate.
Thepotemich [5.8K]
None because he has no water

if he does have water and cups, 16.5 cups of juice
8 0
3 years ago
Evalúe 3z + 6 when Z=4 <br><br> A) 4<br> B) 6<br> C)8<br> D)18
trapecia [35]

Answer:

D 18

Step-by-step explanation:

3z + 6

Let z=4

3*4 +6

Multiply first

12+6

Then add

18

8 0
3 years ago
Read 2 more answers
Angle θ is in standard position. If (8, -15) is on the terminal ray of angle θ, find the values of the trigonometric functions.
notsponge [240]

ANSWER

\sin( \theta)   =  -  \frac{15}{17}

\csc( \theta)   =  -  \frac{17}{15}

\cos( \theta)   =   \frac{8}{17}

\sec( \theta)   =    \frac{17}{8}

\tan( \theta)   =  -  \frac{15}{8}

\cot( \theta)   =  -  \frac{8}{15}

EXPLANATION

From the Pythagoras Theorem, the hypotenuse can be found.

{h}^{2}  = 1 {5}^{2}  +  {8}^{2}

{h}^{2}  = 289

h =  \sqrt{289}

h = 17

The sine ratio is negative in the fourth quadrant.

\sin( \theta)  = -   \frac{opposite}{hypotenuse}

\sin( \theta)   =  -  \frac{15}{17}

The cosecant ratio is the reciprocal of the sine ratio.

\csc( \theta)   =  -  \frac{17}{15}

The cosine ratio is positive in the fourth quadrant.

\cos( \theta)   =  \frac{adjacent}{hypotenuse}

\cos( \theta)   =   \frac{8}{17}

The secant ratio is the reciprocal of the cosine ratio.

\sec( \theta)   =    \frac{17}{8}

The tangent ratio is negative in the fourth quadrant.

\tan( \theta)   =  -  \frac{opposite}{adjacent}

\tan( \theta)   =  -  \frac{15}{8}

The reciprocal of the tangent ratio is the cotangent ratio

\cot( \theta)   =  -  \frac{8}{15}

8 0
3 years ago
Read 2 more answers
After the cataract took Euler's sight, he...?
Mrrafil [7]

Answer: Wrote more articles and books

Step-by-step explanation:

4 0
3 years ago
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