<img src="https://tex.z-dn.net/?f=-2b-%28-7%29%3D11" id="TexFormula1" title="-2b-(-7)=11" alt="-2b-(-7)=11" align="absmiddle" cl

All categories

maks197457 [2]

3 years ago

ass="latex-formula">

Mathematics

2 answers:

Agata [3.3K]3 years ago

7 0

Answer:

b = -2

Step-by-step explanation:

$- 2b - ( - 7) = 11$

$- 2b + 7 = 11$

$- 2b + 7 - 7 = 11 - 7$

$- 2b = 11 - 7$

$- 2b = 4$

$b = 4 \div( - 2) = - 4 \div 2$

$\boxed{\green{b = - 2}}$

Fittoniya [83]3 years ago

5 0

<h2>Answer:</h2>

<h2>Step-by-step explanation:</h2>

$- 2b - ( - 7) = 11 \\ \\ - 2b + 7 = 11 \\ \\ - 2b = 11 - 7 \\ \\ - 2b = 4 \\ \\ b = \frac{4}{ 2} \\ \\ b = 2$

You might be interested in

(ab² + 13b - 4a) + (3ab² + a +7b)

Natalija [7]

Answer:

4ab² + 20b - 3a

Step-by-step explanation:

This question most likely asks us to simplify the expression, as factoring is not possible...

(ab² + 13b - 4a) + (3ab² + a + 7b),

ab² + 13b - 4a + 3ab² + a + 7b,

ab² + 3ab² + 13b + 7b - 4a + a,

Solution : 4ab² + 20b - 3a

4 0

3 years ago

Solve 9x² - 6x + 1 = 0 using the Quadratic Formula.

andrezito [222]

Answer:1/3 i dont know if this is right i just kindly copied the guy on top

Step-by-step explanation:

7 0

3 years ago

Jane will rent a car for the weekend. She can choose one of two plans. The first plan has an initial fee of $55 and costs an add

pishuonlain [190]

She will need to drive 110 miles to be the same

4 0

3 years ago

For homework a student had to complete 15 problems total. If she finished 6 problems in class, what is the ratio of problems she

nexus9112 [7]

Well if the student already finished 6 problems out of 15, there are 15-6 = 9 homework questions she still has to finish.

Still needs to complete: 9.

Already finished: 6

9 : 6.

Simplified: 3 : 2

6 0

3 years ago

Read 2 more answers

Annie walks 15 feet away from her house and places a mirror on the ground. She backs 4 feet away from the mirror so that she can

artcher [175]

Answer:

The house is 18.75 feet tall

Step-by-step explanation:

The triangles are similar by the AA postulate.

We are given the length of the bottom sides of the triangles, 4 and 15 respectively.

Thus, the ratio is 4:15

We are also given the height of Annie's eyes, which is 5 feet. The height of the side that corresponds to the house is 5, so we can set up a proportion.

$\frac{4}{15} = \frac{5}{x} \\4x = (5*15) = 75\\x = \frac{74}{4} \\x = 18.75$

Thus, the house is 18.75 feet tall.

5 0

3 years ago