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ZanzabumX [31]
3 years ago
13

Solve the system of equations by substitution. y = -X 3x + 3y = 0

Mathematics
1 answer:
zepelin [54]3 years ago
6 0

Answer y=x,3x+3y+0

Step-by-step explanation:

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Jose asks his friends to guess the higher of two grades he received on his math tests. He gives them two hints. The difference o
denis23 [38]

Option D. 96 is the correct answer.

Explanation:

Let the higher grade be = x

Let the lower grade be = y

As given, The difference of the two grades is 16

x-y=16 or x=16+y   .... (1)

The sum of one-eighth of the higher grade and one-half of the lower grade is 52.

\frac{1x}{8}+\frac{1y}{2}=52   ... (2)

Putting the value of x=16+y in equation (2)

\frac{16+y}{8}+\frac{y}{2}=52

\frac{16+y+4y}{8}=52

\frac{16+5y}{8}=52

16+5y=416

5y=400

y=80

As x=16+y

x=16+80 = 96

Hence, higher grade is 96.


8 0
3 years ago
Select the correct answer and then click Done.
Dimas [21]

Answer:

f(x) = (x + 10)(x + 4)(x - 1)

Step-by-step explanation:

Given the zeros of a polynomial, say x = a and x = b, then

the factors are (x - a) and (x - b)

The polynomial is then the product of the factors

f(x) = (x - a)(x - b)

Here the zeros are x = - 10, x = - 4 and x = 1, thus the factors are

(x - (- 10)), (x - (- 4)) and (x - 1), that is

(x + 10), (x + 4) and (x - 1)

f(x) = (x + 10)(x + 4)(x - 1)

3 0
3 years ago
The length of a rectangle is three times its width. If the area of the rectangle is 192 ft^2, find its perimeter
Blababa [14]
Answer: 64 feet.

Explanation:
Perimeter formula: 2l + 2w
Area formula: l•w
Length = 3w
Area = 192 ft^{2}
192 = (3w) • w 
192 = 3w^{2}
192 ÷ 3 = 3w^{2} ÷ 3
64 = w^{2} 
\sqrt{64} = \sqrt{ w^{2} }
8 = w 

Width = 8
Length = 3(8) = 24 
Perimeter = 2(24) + 2(8) = 64 feet.

3 0
3 years ago
Read 2 more answers
Which point is at 1 on the number line?
miskamm [114]

Answer:

c

Step-by-step explanation:

5 0
2 years ago
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If $171 was raised during the bake sale and car wash how much money was raised for the dance?
Masja [62]
I'm guessing 71. I can't see everything
7 0
3 years ago
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