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N76 [4]
3 years ago
7

Help! Please I’m not sure what to do I forgot

Mathematics
2 answers:
JulijaS [17]3 years ago
7 0

Answer:

∠ B = 54°

Step-by-step explanation:

Supplementary angles sum to 180°, so

7x + 7 + 4x - 14 = 180

11x - 7 = 180 ( add 7 to both sides )

11x = 187 ( divide both sides by 11 )

x = 17

Then

∠ B = 4x - 14 = 4(17) - 14 = 68 - 14 = 54°

suter [353]3 years ago
3 0
Can someone help me also
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Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?
maxonik [38]

ANSWER

2 \frac{1}{4}

EXPLANATION

We want to find the constant that must be added to

{x}^{2}  - 3x

to form a perfect square.

Comparing the given expression to

a{x}^{2}  + bx + c

we have

a=1 , b=-3 , and c=0.

We need to add

{( \frac{b}{2a} })^{2}

We substitute the values to get,

{( \frac{ - 3}{2(1)} })^{2}  =  \frac{9}{4}

We change this to mix numbers to get,

2 \frac{1}{4}

The last choice is correct.

4 0
3 years ago
What is 3 tenths greater than 80%
elena-14-01-66 [18.8K]

we know that


3 tenths is equal to

\frac{3}{10} =0.30


80% is equal to

\frac{80}{100} =0.80

so


3 tenths greater than80% is equal to add

0.30+0.80=1.10

therefore


the answer is

1.10

6 0
3 years ago
Read 2 more answers
Find the output, k, when the input, t, is -7−7minus, 7.<br> k = 10t-19k=10t−19
sleet_krkn [62]

The value of k is -89

Explanation:

The given expression is k=10t-19

We need to determine the output k, when the input t is -7

<u>Output k:</u>

The value of the output k can be determined by substituting the input t=-7 in the expression k=10t-19

Thus, we have,

k=10(-7)-19

Multiplying the terms 10 and -7, we have,

k=-70-19

Simplifying, we get,

k=-89

Thus, the value of k is -89

7 0
3 years ago
4x+5y=20 need help solving x and y intercept plotting
Mrrafil [7]

Answer:

(Hope this helps can I pls have brainlist (crown)☺️)

Step-by-step explanation:

To find the x-intercept, substitute in  0  for  y  and solve for  x To find the y-intercept, substitute in  0 for  x and solve for  y.

Slope: m=-\frac{4}{5}

x-intercept(s):  ( 5 , 0 )

y-intercept(s):  ( 0 , 4 )

8 0
3 years ago
Two step equation<br><br> n - 5/2 =5
Verdich [7]

Answer:

Step-by-step explanation:

two step equation

n - 5/2 = 5

n = 5 + 5/2

n = 5 + 2.5

n = 7.5

-----------

check

7.5 - 5/2 = 5

7.5 - 2.5 = 5

5 = 5

the answer is good

3 0
2 years ago
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