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3 years ago

Betsy is saving to buy a bird cage. She saves $1 dollar the first week, $3 the second week

Mathematics

2 answers:

Alecsey [184]3 years ago

5 0

Answer:

You do (7*1)+(7*2) then add both

Step-by-step explanation:

UNO [17]3 years ago

3 0

You do (7*1)+(7*2) then add both

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Answer to this question please

fredd [130]

Answer:

Volume is 21

Explanation

Base length is 4.5

Widgth is 3.5

and height is 4 (I can't tell if its 2 because picture is blurry)

V=lwh/3=4.5·3.5·4= 21

8 0

2 years ago

7. If the area of a square is 64 square centimeters, what's the

Anvisha [2.4K]

Answer:

If you're asking what the perimeter is:

C 32cm

If you're asking what the length of a side is:

A 8cm

Step-by-step explanation:

Area of a square is calculated by length x width.

And all four sides of a square are equal in length.

Area: 8cm×8cm=64cm2

Perimeter: 8cm + 8cm + 8cm + 8cm= 32cm

Another way to find the length of the sides would be to take the square root of 64. I believe that only works with the area of a square though.

√(64)=8

5 0

3 years ago

Da + ca<br><img src="https://tex.z-dn.net/?f=da%20%2B%20ca" id="TexFormula1" title="da + ca" alt="da + ca" align="absmiddle" cla

sergejj [24]

Answer:

$\boxed{a(c + d)}$

Step-by-step explanation:

$da + ca = a(c + d)$

4 0

2 years ago

Determine whether ab is parallel to cd

shtirl [24]

Answer:

Yes, it is.

Step-by-step explanation:

When alternate interior angles (∠ABC and ∠BCD) are congruent, it means the lines are parallel.

8 0

3 years ago

Read 2 more answers

Calculate the frequency in hertz of photons of light with energy of 8.10 × 10-19 J.

stira [4]

The Planck–Einstein relation $E=hv$ gives that E, the photon energy, is equal to h, Planck's constant, times <span>ν</span>, the frequency.

We can solve the equation in terms of frequency to get
$v= \dfrac{E}{h}$

We substitute our given energy, $8.10 \times 10^{-19} J$ , and Planck's constant, $6.626 \times 10^{-34} Js$ .

$v= \dfrac{8.10 \times 10^{-19} J}{6.626 \times 10^{-34} Js}=1.22 \times 10^{15} s^{-1}=1.22 \times 10^{15} Hz$

5 0

3 years ago