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emmasim [6.3K]
3 years ago
10

8x + 7 equals -9 solve for x

Mathematics
1 answer:
Montano1993 [528]3 years ago
8 0
The answer to this equation is
x= (1/4)
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1 over 5 plus 2 over 5
g100num [7]

Answer:

\frac{3}{5}

Step-by-step explanation:

Before you add 2 fractions, the denominator needs to be the same. If they are the same, which they are, then add the 2 numerators.

1 plus 2 equals 3.

So the answer is 3 over 5.

8 0
4 years ago
Mia and Luke made 85 origami together. Mia made 4 pieces of origami every 3 minutes. Luke made 3 pieces of origami every 4 minut
julia-pushkina [17]
For ease of solving, let's first find the rate of Mia and Luke per minute. Since Mia can do 4 pieces every 3 minutes, then she can do \frac{4}{3} of a piece per minute. Luke on the other hand can do \frac{3}{4} of a piece per minute.

To find how many pieces they made, we first need to find the time it took for them to make the pieces. We assign t as the time Mia spent making origami. Since Luke spent 5 more minutes, we can denote his time as t+5.

Putting this into an equation we'll get:
\frac{4}{3}t+ \frac{3}{4}(t+5)=85
\frac{4}{3}t+ \frac{3}{4}t+\frac{15}{4}=85
\frac{25}{12}t=81.25
t=39

Therefore, Mia made pieces of origami for 39 minutes. Knowing this, we can find out the number of pieces of origami she made:
39* \frac{4}{3} =52

ANSWER: Mia made 52 pieces of origami.
7 0
4 years ago
URGENT!! The difference between the roots of the quadratic equation x2−12x+q=0 is 2. Find q
Sedaia [141]

Answer:

q=35

Step-by-step explanation:

x2 - 12x + q = 0

Let the two roots be r and r+2.

Factor the quadratic expression:

(x - r)[x - (r + 2)] = 0

Expand, simplify, group like terms, and get

x2 - 2(r + 1)x + r(r + 2) = 0

Compare to

x2 - 12x + q = 0

and set equal the coefficients of like terms:

Coefficient of x:

-2(r + 1) = -12 ⇒ r + 1 = 6 ⇒ r = 5

(Then the other root is r + 2 = 5 + 2 = 7)

Constant term:

r(r + 2) = q ⇒ 5(5 + 2) = q

q = 35

Test the solution:

(x - 5)(x - 7) = x2 - 12x + 35

With two roots differing by 2, you get an equation of the form

x2 - 12x + q = 0

with q = 35.

3 0
3 years ago
Read 2 more answers
The number of sides of two regular polygons are as 1:2 and their interior angles are as 2:3 .Find the number of sides in each po
Tom [10]

Answer look below

Step-by-step explanation:

Hope this helps

8 0
3 years ago
Find polynomial from zeros<br> Zeros 3i,2-i
SSSSS [86.1K]
Y=x4−4x3+14x2−36x+45
8 0
3 years ago
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