1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mash [69]
3 years ago
6

How to solve -2(-4f+5)=-7+2f-9

Mathematics
2 answers:
Damm [24]3 years ago
5 0

Answer:

f=\frac{3}{5}

Step-by-step explanation:

-2(4f+5)=-7+2f-9

First, use PEMDAS to distribute the -2 to the parenthesis.

-8f -10 = -7+2f -9

Combine like terms on the right side.

-8f - 10 = -16+2f

Now, you may either subtract the f's or the constants. I'll subtract the constants first, meaning I will add 10 to both sides.

-8f = -6 + 2f

Now subtract the 2f from both sides.

-10f = -6

Divide both sides by 10.

f = \frac{-6}{-10}

Simplify.

f = \frac{3}{5}

Alinara [238K]3 years ago
5 0

Answer:

The value of f:

  • f=-1

Step-by-step explanation:

Given the expression

-2\left(-4f+5\right)=-7+2f-9

Group like terms

-2\left(-4f+5\right)=2f-7-9

Subtract the numbers: -7-9=-16

-2\left(-4f+5\right)=2f-16

Expand:  -2(-4f + 5) = 8f - 10

8f-10=2f-16

Add 10 to both sides

8f-10+10=2f-16+10

Simplify

8f=2f-6

Subtract 2f from both sides

8f-2f=2f-6-2f

Simplify

6f=-6

Divide both sides by 6

\frac{6f}{6}=\frac{-6}{6}

Simplify

f=-1

Therefore, the value of f:

  • f=-1
You might be interested in
If we wanted to create a new 90% confidence interval from a different sample for the proportion of those with a two on one date
slava [35]

Answer: 271

Step-by-step explanation:

The formula we use to find the sample size is given by :-

n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2

, where z_{\alpha/2} is the two-tailed z-value for significance level of (\alpha)

p = prior estimation of the proportion

E = Margin of error.

If prior estimation of the proportion is unknown, then we take p= 0.5 , the formula becomes

n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2

n=0.25(\dfrac{z_{\alpha/2}}{E})^2

Given :   Margin of error : E= 0.05

Confidence level = 90%

Significance level \alpha=1-0.90=0.10

Using z-value table , Two-tailed z-value for significance level of 0.10

z_{\alpha/2}=1.645

Then, the required sample size would be :

n=0.25(\dfrac{1.645}{0.05})^2

Simplify,

n=270.6025\approx271

Hence, the required minimum sample size =271

3 0
3 years ago
Questioning my sanity once again....
Rama09 [41]

Answer:

it not wrong to do it it's just not right to do it I get it

I do it too sometimes so it not just you

oh and can I have brainliest it would really help out

3 0
3 years ago
Find the ordered pair that makes both the equations below true
NNADVOKAT [17]

Answer:

(3, 1)

Step-by-step explanation:

(a) Algebraic solution

(1)  y = -⅔x + 3

(2) y =   2x  - 5

Set Equation (1) equal to Equation (2)

-⅔x + 3 = 2x - 5

Multiply each side by 3

-2x + 9 = 6x - 15

Add 15 to each side

-2x + 24 = 6x

Add 2x to each side

24 = 8x

Divide each side by 3

(3) x = 3

Substitute (3) into (2)

y = 2×3 - 5 = 6 - 5 = 1

The ordered pair that makes both equations true is (3, 1).

(b) Graphical solution

In the diagram below, the red line is the graph of Equation (1). The blue line is the graph of Equation (2). The point of intersection is at (3, 1).

7 0
3 years ago
How do you simplify this expression
raketka [301]
Convert <span>6\frac{3}{8}<span>6<span><span>​8</span>​<span>​3</span><span>​​</span></span></span></span><span> to improper fraction. Use this rule: </span><span>a \frac{b}{c}=\frac{ac+b}{c}<span>a<span><span>​c</span>​<span>​b</span><span>​​</span></span>=<span><span>​c</span>​<span>​<span>ac+b</span></span>​​:</span></span></span>
​∣8<span><span>​<span>​<span>6×8+3</span></span><span>​​</span></span>−2∣+∣−8<span><span>​8</span>​<span>​5</span><span>​​</span></span>−1<span>∣


</span></span>Simplify <span>6\times 8<span>6×8</span></span><span> to </span>48: <span><span><span><span><span>
​</span>8</span>​<span>​<span>48+3</span></span><span>​​</span></span>−2∣+∣−8<span><span>​8</span>​<span>​5</span><span>​​</span></span>−1∣


</span>Simplify <span>48+3<span>48+3</span></span><span> to </span>51:</span><span><span><span><span><span>
​</span>8</span>​<span>​<span>51</span></span><span>​​</span></span>−2∣+∣−8<span><span>​8</span>​<span>​5</span><span>​​</span></span>−1∣

</span> Make the denominators the same:
<span><span><span>51</span><span>​​/8</span></span>−2×<span><span>​8</span>​<span>​8</span><span>​​

</span></span></span><span>Simplify. Denominators are now the same:
</span>
<span><span><span>51</span><span>​​/8</span></span>−<span><span>​8</span>​<span>​<span>16</span></span><span>​​
</span>
</span></span>Join the denominators: \frac{51-16}{8}<span><span>​8</span>​<span>​<span>51−16</span></span><span>​​
</span>
etc.. and your answer will be 14

</span></span>
3 0
3 years ago
Resolver usando recíprocos y multiplicativo inverso: 2X-8 = 2 5<br>​
STatiana [176]

2x - 8 = 25

2x = 25 - 8

x = 17 \div 2

x = 8.5

7 0
3 years ago
Other questions:
  • Three- toed sloths move very slowly, using as little energy as possible. They sleep, eat, and even give birth upside down. A bab
    8·1 answer
  • Maje a ten or hundred to add mentally
    10·1 answer
  • Cloud nine is having a sale on all shirts and pants in the store.Olivia purchased 8 shirts 4 pairs of pants for $176.Raheem purc
    6·1 answer
  • If 200% of 40% of x is equal to 40% of y, then x is what percent of y?
    5·1 answer
  • Carl and rita at breakfast at the local diner. Their bill came to $11.48. They gave their waitress a tip that wad 25% of the bil
    15·1 answer
  • timothy bought 12 of his cars to the babysitters. these toy cars represent 30% of his toy car collection. what is the total numb
    13·1 answer
  • A popular board game manufacturer was interested in the relationship between the amount of time it takes to play a game and how
    14·1 answer
  • WILL GIVE BRAINILEST TO WHO ANSWERS IN LESS THEN 10 MINS
    5·1 answer
  • What is a lifetime cap?
    10·1 answer
  • I need some help, timed.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!