All categories

3 years ago

Plzzz helpppp

Mathematics

1 answer:

Crank3 years ago

7 0

Answer:

11 boxes of candles

Step-by-step explanation:

first, set it up as an equation. let x stand for the amount of boxes she needs.

100=8x+15

next, subtract 15 from both sides of the equation.

100-15=8x+15-15

85=8x

then, you need to get x by itself. to do this, divide 8 from both sides of the equation.

85/8=8x/8

x=10.62, but you can't buy half a box, so you have to round up.

so, she needs to buy 11 boxes of candles.

You might be interested in

Bromine michael has a job transporting soft drinks by truck. his truck is filled with cans that weighounces each and bottles tha

diamong [38]

The questions is mis typed and incomplete. So if you could please re post the question so i could answer it.

8 0

4 years ago

Solve the equation 3x2+28x+49=0 by factoring.

Ket [755]

Answer:

−

Step-by-step explanation:

 

= 

− 

 

± 

 

2 

− 

4 

 

√ 

2 

 

x={b}}^{2}-4{a}}{2{a}}} 

x=2a−b±b2−4ac 

Once in standard form, identify a, b, and c from the original equation and plug them into the quadratic formula. 

3 

 

2 

+ 

2 

8 

 

+ 

4 

9 

= 

0 

3x^{2}+28x+49=0 

3x2+28x+49=0 

 

= 

3 

a={3}} 

a=3 

 

= 

2 

8 

b={28}} 

b=28 

 

= 

4 

9 

c={129}{49}} 

c=49 

 

= 

− 

2 

8 

± 

2 

8 

2 

− 

4 

⋅ 

3 

⋅ 

4 

9 

√ 

2 

⋅ 

3 

= 

− 

2 

8 

± 

1 

4 over 

6 

= 

− 

2 

8 

+ 

1 

4 

6 

x={-28+14}{6} 

x=6−28+14 

 

= 

− 

2 

8 

− 

1 

4 

= 

− 

7 

3 

x=-{7}{3} 

x=−37 

 

= 

− 

7 

= 

− 

7 

3 

 

= 

− 

7

6 0

3 years ago

The fit line equation for the scatterplot is y = -2.61x+152.51, where x is variable 1 and y is variable 2. according to the equa

Talja [164]

The expected value of y when x-value is 45 is 35.06

Any equation which can be put in the form ax + by + c = 0, where a, b and c are real numbers, and a and b are not both zero, is called a linear equation in two variables. For example, y = 2x+3 and 2y = 4x + 9 are two-variable linear equations.

In the given question value of x is given and value of y is asked.

The given equation : y = -2.61x+152.51 Such questions can be solved by substituting the given value of variable in the equation which will help us find the unknown.

Substituting x = 45 in the given equation , we get

y = -2.61 x 45 + 152.51

y = -117.45 + 152.51

y = 35.06

Thus the expected value of y when x-value is 45 is 35.06

Learn more about Linear equations in two variables here :

brainly.com/question/24085666

#SPJ4

8 0

2 years ago

(1+cos2x)/(1-cos2x) = cot^2x

sesenic [268]