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3 years ago

The average mark scores by 29 students in a science test was 56%. Jessica was sick, so she sat the

Mathematics

1 answer:

alisha [4.7K]3 years ago

4 0

Answer:

56.5%

$\frac{29 \times 56 + 71}{30 \times 100} = 0.565 = 56.5\%$

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What is the value of this expression when x= -6 and y = -1/2? 4(x2 + 3) - 2y?

ladessa [460]

the answer is A

i took the same test

6 0

3 years ago

Latisha and Raquel order two drinks for $1.50 each, two dinners for $12.99 each and share one desert for $3.50. What expression

enot [183]

Answer:

2( 1.50 + 12.99 + 3.50) = $36.08

Step-by-step explanation:

That is the distributive property way.

You multiply 2 by every number and add them all together.

5 0

3 years ago

Help please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Dafna11 [192]

If f(x)= 3x+2 and g(x)= 4x, then

f(x)+g(x) = 3x+2+4x

= 7x+2

For f(g(x)), you work from the inside and work your way out. Another way of thinking is to go from right to left. (Inside/out and right/left are the same simply using different wording).

So what is g(x)? 4x.

Now, you take 4x and plug it into the f(x).

** Math--> English translation:

Look at the f(x) equation. Wherever you see an x in the f(x), replace the x with 4x [because 4x is the g(x)]. Basically, plug the g(x) into f(x).

So:

f(g(x)) becomes

f(4x) becomes

3 (4x)+2 = 12x+2

** Disclaimer: Notation may be inaccurate.

That's your answer. (Usually you leave it as so, but if your instructor wants it factored, then proceed).

As for the third part, I am unsure of a clear answer, so I am unable to provide an answer at the time.

**********************

Hope that helped.

DISCLAIMER:

Always double check with a reliable source, as mistakes are a possibility. Never use this, or any, platform to cheat.

6 0

3 years ago

Two angles are complementary. If the measure of one angle is 20

mario62 [17]

Answer:

the smaller angle is 35 degrees.

Step-by-step explanation:

complementary angles are 90 degrees, so you would set your entire equation to 90.

we can use the variable x to represent the unknown smaller angle. we know that the larger angle is 20 more degrees than the unknown smaller angle (x). we can set up the equation like this:

x + x + 20 = 90

the first x represents the smaller angle and the x + 20 represents the other angle, which is 20 more than the smaller angle. we set it to 90 because we know that the entire angle will be 90 degrees

move variables and constants to opposite sides of the equal sign and combine like terms:

x + x = 90 - 20

2x = 70

divide both sides by 2 to isolate 90:

x = 35

you can plug x back into the equation to check your answer if you want

hope this helps!! :)

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4 years ago

What is the regular area of a trapezoid?

noname [10]

Answer:

Regular Area of trapezoid u can choose anyone either this one A=(a+b) or this one 2×h 

maybe this might be ur answer

6 0

4 years ago