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Natalka [10]
3 years ago
12

Answers with explanations

Mathematics
1 answer:
Snezhnost [94]3 years ago
7 0

To answer this question, try to solve the system of equations.  Start by plugging in "x^{2} +3x-7" in for y in the second equation:

x^{2} +3x-7-5x+8=0

<em>*Combine like terms*</em>

x^{2} -2x+1=0

<em>*Factor*</em>

(x-1)(x-1)=0

<em>*Set each term equal to 0*</em>

x-1=0

<em>*Add 1 to both sides*</em>

x=1


C) There is exactly 1 solution.


Hope this helps!!

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This is what I've done so far but does anyone know what I do next or did I make a mistake
grigory [225]
Remmeber, you can do anything to an equation as long as you do it to both sides

for inequalities, if you multiply or divide both sides by a negive, flip the direction of the inequality sign

pemdas always applies
but also the commutative property and assiociative property

so
2(5y+13)-6<20
add 6 both sides
2(5y+13)<26
divide both sides by 2 (easier that distributing)
5y+13<13
minus 13 both sides
5y<0
y<0 is the solution
7 0
3 years ago
When a number decreased by 10% the result in 63. What is the number?
Ugo [173]
The number is 69.3 because percent means 0.01, so 10 x 0.01 = 1.1
so 1.1 x 63 = 69.3. you can also do 63 x 10% = 69.3.
4 0
3 years ago
Match the phenomenal expression on the left with the simplified version on the right
nalin [4]

Given the polynomial expression:

(y + 5)²

(y - 5)(y + 5)

Let's simplify each of the given expression:

a.) (y + 5)²

The given equation is a factor of a perfect square trinomial. For this type of expression, the following is the formula for expanding it.

\text{ (a+b)}^2\text{ = }a^2\text{ + 2ab + }b^2

We get,

\mleft(y+5\mright)^2=(y)^2+2(y)(5)+(5)^2(y+5)^2=y^2+10y+25

b.) (y - 5)(y + 5)

To be able to simplify the following expression. We will be using the formula for the difference of two squares.

(a+b)(a-b)=a^2-b^2

We get,

\mleft(y-5\mright)\mleft(y+5\mright)=(y)^2-(5)^2(y-5)(y+5)=y^2-25^{}

8 0
1 year ago
Rearrange the formula C = 5/9 (F − 32) for F.
shtirl [24]
The answer is (9c/5)+32=F
5 0
3 years ago
Read 2 more answers
Please help !!!! will mark brainliest
GarryVolchara [31]

Answer:

the answer is D :))) hope you pass this

3 0
2 years ago
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