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wlad13 [49]
3 years ago
12

Got this wrong on my Algebra 1 test. Any answers?

Mathematics
1 answer:
Ludmilka [50]3 years ago
8 0
2x +6y - 4z is the distributed answer.
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There are 212 students in the 8th grade class. The number of girls is 49 less than twice the number of boys. How many girls and
Anna71 [15]

Answer:

girls = 125

boys = 87

Step-by-step explanation:

Total number of students in the 8th grade class = 212

Let g represent girls and b represent boys

Number of girls, g = 2b -49

Note that boys and girls in the class give a total of 212

So,

g + b = 212 ....eq 1

Slot in the value of g in the equation

2b - 49 + b = 212

2b + b - 49 = 212

3b - 49 = 212

Add 49 to both sides

3b - 49 + 49 = 212 + 49

3b = 261

Divide both sides by the coefficient of b which is 3

b = 87

Now that we've found the number of boys, let's find that of girls

We will slot in the value of b in eq 1

g + 87 = 212

Subtract 87 from both sides

g + 87 - 87 = 212 - 87

g = 125

So the number of boys is 87 and the number of girls is 125

8 0
3 years ago
Find the dervite of y=X^2 + x + 1
stellarik [79]

Answer:

2x + 1.

Step-by-step explanation:

y=x^2 + x + 1

Using the algebraic derivative rule, if y = ax^n then y' =  anx^(n-1) :

The derivative is 2x^(2 - 1) +  1x^(1-1)

= 2x^1 + x^0

= 2x + 1.

5 0
3 years ago
Read 2 more answers
Find the output, f , when the output, t , is 7. f=-2t-3
Gemiola [76]

Answer:

-17

Step-by-step explanation:

You replace the t with 7 making the equation , f=-2(7)-3. Using PEMDAS, you solve -2 x 7 making it -14. Finally, subtract -3 from -14 making it -17.

8 0
4 years ago
Josef worked 15.35 hours one week and 32.7 hours the next week. how many hours did josef work over the two weeks?
dem82 [27]
In order to calculate, the time of his total work, you need to add them, 
It would be: 15.35 + 32.7 = 48.05

In short, Your Answer would be 48.05 hours

Hope this helps!
3 0
3 years ago
Read 2 more answers
Hey can someone please help me with this? I’d appreciate if you put steps down and the answer! Tysm.
Arada [10]
What’s the actual problem?
5 0
3 years ago
Read 2 more answers
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