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miskamm [114]
3 years ago
8

I’ll mark brainliest pls I need asap

Mathematics
1 answer:
timurjin [86]3 years ago
8 0

Answer:

10

Step-by-step explanation:

-(-) = +

2-(-8)

2+8

=10

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What value of x makes the equation true?<br> -1=1 – 4(-5+4x) – 4x
cluponka [151]

Answer:

x = 11/10

Step-by-step explanation:

we have from statement:

-1=1 - 4(-5+4x) – 4x

we apply distributive property:

-1 = 1 -4*(-5) -4*(4x) -4x

so we have:

-1= 1+20 -16x -4x

-1 = 21 -20x

-22=-20x

so we have:

x=22/20

x=11/10

we can substitute the x value found:

-1 = 1 - 4(-5+4*(11/10)) – 4*(11/10)

-1 = 1+20 -17.6 -4.4

-1 =21 -22

so we have:

-1 = -1

4 0
3 years ago
Bill and Mary Ann went to the Viola bakery. Bill bought 5 pies and 7 donuts for ​$12.65. Mary Ann bought 6 of each for ​$12.30.
sweet [91]

Answer:

Pies=$0.85

Donuts= $1.20

Step-by-step explanation:

In the equation let p stand for the number of pies and d stand for the number of donuts.

To solve this set up 2 equations, one representing bill and the other representing Mary Ann.

  • Bill's equation is 5p+7d=$12.65.
  • Mary Ann's equation is 6p+6d=$12.30

Then solve using a system of equations. Systems of equations can be solved using elimination or substitution. I will use substitution. Solve bill's equation for p. This gives you p=\frac{12.65-7d}{5}. Then, you can substitute that into Mary Ann's equation. This looks like 6\cdot \frac{12.65-7d}{5}+6d=12.3. Solve for d. Once you solve d=1.20. Finally, substitute 1.20 back into either Bill's or Mary Ann's for d and solve for p. No matter which equation you use p=0.85.

3 0
2 years ago
Evaluate the following expressions:<br> 1. 5(a+2b)-3b
Alika [10]

Answer:

=5a+7b

Step-by-step explanation:

Expand: 5(a + 2b): 5a + 10b
=5a+10b-3b
<em>Add similar elements: 10b-3b=7b
</em>=5a +7b

4 0
2 years ago
Read 2 more answers
What are the zeros of the polynomial function f(x)=x^3-x^2-6x
aalyn [17]

Answer:

(

x

)

=

x

(

x

2

−

x

−

6

)

=

x

(

x

−

3

)

(

x

+

2

)

=

0

 

x

=

0

,

x

=

3

,

x

=

−

2

Explanation:

To find the zeros of the polynomial above first factor out the common factor then factor the remaining polynomial and set it equal to zero. Finally solve for x.

Step-by-step explanation:

6 0
3 years ago
A bottle of medicine contains 0.5 kilograms of medicine. One dose of medicine is 20g for kids &amp; 45g for adults. If a medical
vaieri [72.5K]
No (see picture for explanation)

3 0
3 years ago
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