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katrin [286]
3 years ago
6

Simplify the expression: 2(5 + 7c) need help ​

Mathematics
2 answers:
noname [10]3 years ago
6 0

Answer:

10+14c

Step-by-step explanation:

You multiply every number inside the parenthesis by 2.

frosja888 [35]3 years ago
5 0

Answer:

10+14c

Step-by-step explanation:

Multiply two times what is in parentheses.

10+14c

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Triangle QST is isosceles, and Line segment R T bisects AngleT. Triangle Q S T is cut by bisector R T. The lengths of sides S T
Katyanochek1 [597]

Answer:

m∠QRT = 90°

m∠QRT = m∠SRT

Step-by-step explanation:

Triangle QST is isosceles with QT ≅ ST. In isoscels triangle QST, angles STR and RTQ are congruent.

RT is angle T bisector, so angles QTR and STR are congruent.

Consider two triangles QTR and STR. In these triangles:

  • TR ≅ TR (reflexive property);
  • ∠QTR ≅ ∠STR (given);
  • QT ≅ ST (given).

By SAS postulate, these two triangles are congruent. Two congruent triangles have congruent corresponding sides, so

  • QR ≅ SR
  • ∠QRT ≅ ∠SRT

Angles QRT and SRT are supplementary (add up to 180°). Since these two angles are congruent, they have the same measure equal to \frac{1}{2}\cdot 180^{\circ}=90^{\circ}

So, true options are

m∠QRT = 90°

m∠QRT = m∠SRT

7 0
4 years ago
Read 2 more answers
Watch help video<br> Which value of x satisfies the equation
PilotLPTM [1.2K]

Answer:

-1

Step-by-step explanation:

1.25(x+1.5)=0.625

(x+1.5)=0.5

x=-1

7 0
3 years ago
naomi has earned $54 mowing lawns the past two days .She worked 2.5 hours yesterday and 4.25 hours today .if naomiis paid the sa
RUDIKE [14]

Answer:

8$ per hour

Step-by-step explanation

First, we need to find how many hours Naomi worked, total.

Simply add 2.5+4.25=6.75

Now we know that Naomi earned 54$ over 6.75 hours.

All we have to do to find the hourly rate is divide 54/6.75=8

Naomi earns 8$ per hour mowing lawns.

6 0
3 years ago
Read 2 more answers
Help me plz i need help i need help
tigry1 [53]

Answer:

the third one

8 0
3 years ago
Is anyone good at this? Please help me!
liubo4ka [24]

Answer:

Step-by-step explanation:

For a function given as,

f(x)= 2x + 2

Domain of the given function is → {-5, -1, 2, 3}

For the Range of the given function,

f(-5) = 2(-5) + 2

      = -8

f(-1) = 2(-1) + 2

      = -2 + 2

      = 0

f(2) = 2(2) + 2

     = 6

f(3) = 2(3) + 2

     = 8

Therefore, set for the range will be → {-8, 0, 6, 8}

Now plot the ordered pairs on the graph,

(-5, -8), (-1, 0), (2, 6), (3, 8)

5 0
3 years ago
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