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MrMuchimi
3 years ago
12

I need to do these math problems. Can some one help?

Mathematics
1 answer:
vlada-n [284]3 years ago
8 0

Answer:

<h3>2. 4.9x^5 - 5x^3 + 2.3</h3><h3 /><h3>3. 78x^6 y^3 z^3</h3><h3 /><h3>4. 6x^2 + 14x - 12</h3><h3 /><h3>8. 9mnr^2 - 10m^2 + 7n - 14m^2 n</h3><h3 /><h3>9. 81x^3 y + 45 x^2 y^2 - 9xy^4</h3><h3 /><h3 /><h3 />
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Solve the system of equations. Show your work.<br> y = x^2 -3x +4 <br> x + y = 4
sesenic [268]

Answer:

x + y = 2 ,  y = x 2 − 4 x + 4

Replace all occurrences of  

y

with  x 2 − 4 x + 4

in each equation.

x 2 − 3 x + 4 = 2 y = x 2 − 4 x + 4

Solve for  

x

in the first equation.

x = 2 , 1 y = x 2 − 4 x+ 4

Replace all occurrences of  

x  with  2

in each equation.

y=0 x = 2

Replace all occurrences of  x

with  1

in each equation.

y = 1 x = 1

The solution to the system is the complete set of ordered pairs that are valid solutions.

( 2 , 0 ) ( 1 , 1 )

The result can be shown in multiple forms.

Point Form:

( 2 , 0 ) , ( 1 , 1 )

Equation Form:

x=2 , y = 0 x = 1 , y = 1

Step-by-step explanation:

3 0
3 years ago
Tony took a math quiz last week. There were 80 problems on the quiz and Tony answered 70% of them correctly. How many problems d
Nutka1998 [239]

Answer:

56 problems

Step-by-step explanation:

So we already know that the answer is: 56. However, a good help is knowing how to obtain this answer from the data provided.

Tony's quiz had 80 questions

Tony correctly answered 70% of them.

We can always write a percentage amount as a ratio by dividing the amount by 100.

70\% = \frac{70}{100} = 0.7.

This means that for every 100 questions, tony will respond correctly 70.

So, if Toni did a questionnaire of n questions, the amount that will answer correctly is calculated by the following expression:

C = n*\frac{70}{100}

If n = 80 then:

C = 80 * \frac{70}{100}\\\\C = 56

7 0
3 years ago
Read 2 more answers
Who would be incorrect?
telo118 [61]
Student B answered correctly
6 0
3 years ago
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Todd and his brother Robert are going to use 512 square feet of their backyard for skateboard ramps. The shape of the backyard i
dedylja [7]

Answer:

the width if 16 feet the length is 32

Step-by-step explanation:

4 0
3 years ago
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Which is the value of the expression?<br><br> (-5)2<br> a. -25<br> b. -10<br> c. 10<br> d. 25
Ymorist [56]

Step-by-step explanation:

option d is correct

as the exponent is even so the required ans. will be positive.

<em>hope </em><em>this</em><em> answer</em><em> helps</em><em> you</em><em> dear</em><em>.</em><em>.</em><em>.</em><em>take </em><em>care </em><em>and</em><em> may</em><em> u</em><em> have</em><em> a</em><em> great</em><em> day</em><em> ahead</em><em>!</em>

8 0
3 years ago
Read 2 more answers
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