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valentina_108 [34]
3 years ago
7

Question 8 (1 point)

Mathematics
1 answer:
sergey [27]3 years ago
3 0
Y=-5x+4 y=7x+5 that is the line
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Solve for x in the equation x² - 10x + 25 = 35.
harkovskaia [24]

Answer: Second option.


Step-by-step explanation:

 1. To solve this problem you can applly the quadratic formula, which is shown below:

 x=\frac{-b+/-\sqrt{b^{2}-4ac}}{2a}

2. The quadratic  equation is:

x^{2}-10x+25-35=0\\x^{2}-10x-10=0

3. Then:

a=1

b=-10

c=-10

4. Therefore, when you substitute these values into the quadratic formula, you obtain the following result:

x=\frac{-(-10)+/-\sqrt{(-10)^{2}-4(1)(-10)}}{2(1)}

x=5±√35

7 0
3 years ago
Read 2 more answers
Simon bought 2/3 pounds of cookies He ate 4/5 of the cookies he bought what was the weight of the cookies that Simon ate
Stolb23 [73]
He ate 8/15 of a pound of the cookies.

If we are looking for 4/5 of something, we just multiply the amount by 4/5.

To multiply fractions, just multiply straight across.

2 x 4 = 8 in the numerator
3 x 5 = 15 in the denominator
7 0
3 years ago
Read 2 more answers
10x + 7y = –8<br> 7x + 7y = –14
Georgia [21]

Answer:

(2, - 4 )

Step-by-step explanation:

Given the 2 equations

10x + 7y = - 8 → (1)

7x + 7y = - 14 → (2)

Subtract (2) from (1) term by term to eliminate y

(10x - 7x) + (7y - 7y) = - 8 - (- 14) , that is

3x = 6 ( divide both sides by 3 )

x = 2

Substitute x = 2 into either of the 2 equations and solve for y

Substituting into (1)

10(2) + 7y = - 8

20 + 7y = - 8 ( subtract 20 from both sides )

7y = - 28 ( divide both sides by 7 )

y = - 4

solution to the system of equations is (2, - 4 )

4 0
2 years ago
If an original price is 1,195 and increased to 2,075 what is the percent
Ivenika [448]
|1195 - 2075| = | - 880| = 880
1195 + 2075 = 3270 \div 2 = 1635
\frac{880}{1635} = 0.538226 \times 100 = 53.8226% difference
3 0
3 years ago
The temperature has been going down at a constant rate.In 4 hours it went down 12 degrees.Which expression best shows the temper
fomenos

Answer:

<u>t = t₀ - 3n</u>

Step-by-step explanation:

Let t be the temperature and t₀ be the initial temperature of the day

Let n be the number of hours after the initial temperature ( t₀) was registered

Let -3 be the constant of change of temperature ( In 4 hours it went down 12 degrees)

Now, let's write down the expression that shows the temperature change each hour, this way:

t = t₀ - 3n

After 2 hours

t = t₀ - 3 * 2 = t₀ - 6

After 5 hours

t = t₀ - 3 * 5 = t₀ - 15

After 3 hours and 30 minutes

t = t₀ - 3 * 3.5 = t₀ - 10.5

5 0
3 years ago
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