3 years ago

What is the definition of numerical expression

Mathematics

2 answers:

PIT_PIT [208]3 years ago

6 0

A expression involving only numbers and or operation symbols.

OleMash [197]3 years ago

6 0

A numerical expression is a mathematical phrase involving
only numbers and one or more operational symbols.

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Hannah has $3.10 in her piggy bank in nickels and quarters. If there are 22 coins in her piggy bank, how many are nickels and ho

PIT_PIT [208]

Answer:

$12\ nickel$

$10\ quarter$

Step-by-step explanation:

we know that

$1\ nickel=\$0.05$

$1\ quarter=\$0.25$

Let

x------> the number of nickel coins

y-----> the number of quarter coins

we know that

$x+y=22$

$x=22-y$ -----> equation A

$0.05x+0.25y=3.10$ ----> multiply by 100 both sides

$5x+25y=310$ -----> equation B

Substitute equation A in equation B and solve for y

$5(22-y)+25y=310$

$110y-5y+25y=310$

$20y=310-110$

$20y=200$

$y=10\ quarter$

$x=22-y$ ------> $x=22-10=12\ nickel$

7 0

3 years ago

Read the picture, fhankyou

valentina_108 [34]

Hi,
The second option is the correct answer.

8 0

4 years ago

Read 2 more answers

Pls help me I think it might be 14 but I’m not sure

mash [69]

Yes the answer is 14 good job

8 0

3 years ago

Please help it is midpoint

almond37 [142]

(15,9)
(1,-9)

$\\ \rm\hookrightarrow (x,y)=\left(\dfrac{x_1+x_2}{2},\dfrac{y_1+y_2}{2}\right)$

$\\ \rm\hookrightarrow (x,y)=\left(\dfrac{15+1}{2},\dfrac{9-9}{2}\right)$

$\\ \rm\hookrightarrow (x,y)=\left(\dfrac{16}{2},\dfrac{0}{2}\right)$

$\\ \rm\hookrightarrow (x,y)=(8,0)$

3 0

3 years ago

Read 2 more answers

Expand.<br> If necessary, combine like terms.<br> (X+ 6)(x+6)=

lapo4ka [179]

Answer:

Step-by-step explanation:

Use FOIL method

(x + 6)(x +6) = x*x + x*6 +6*x + 6*6

= x² +<u> 6x + 6x</u> + 36 {add like terms}

= x² + 12x + 36

5 0

3 years ago