Mark all of the statements that are true.

Mathematics

1 answer:

aksik [14]3 years ago

4 0

C.,E
skjsjsnakakajJjjJjejekm

You might be interested in

F(x)=2x^2-5;find when f(x)=-7

Daniel [21]

Answer:

x=i or no solution exists depending on the user's grade

Step-by-step explanation:

f(x) = 2x^2-5

-7 = 2x^2-5

-2 = 2x^2, x^2=-1, x=i

6 0

2 years ago

Read 2 more answers

What is the product written in scientific notation?

Vesnalui [34]

First, you multiply 2.1 by 3.2, which gives you the answer of 6.72. Then, you multiply 10-2 by 10-4. One rule about multiplying exponents, you just add the exponents. So 10-2 x 10-4 = 10-6. Finally you get the answer of C. 6.72 x 10-6.

7 0

3 years ago

Rachel and her friends are making necklaces out of beads and straws. They plan to use 12 beads and 5 straws for each necklace. T

bagirrra123 [75]

Answer:

225 necklaces.

Step-by-step explanation:

Assuming that they have the necessary amount of straws to match the beads then we can use the following simple equation to solve this problem.

t = b/12 ... where t is the total amount of necklaces and b is the number of beads you have

t = 2700 / 12

225 necklaces.

For 225 necklaces you would also need 1125 straws since each necklace requires 5 straws to be fully made. Therefore if you have this amount you should not run into any problems.

3 0

3 years ago

A raindrops has a mass of 0.50g. how many moles of water does a raindrop contain

alina1380 [7]

So, here you have to look at the periodic table and see what the molar mass of each molecule composing the water compound $H_2 O$
its two hydrogen atom plus an oxygen molecule, making it about 18g per mol.

That said, looking at the mass, we have to ask ourselves, if a mol of water contains 18g of mass, how many moles do we have in 0.5g of water?
We just do a cross multiplication:
$\frac{(0.5)}{18} =0.027 mol$

7 0

3 years ago

Hisako sells dolls at her doll store. If she sells a doll for $33, and there is 4% sales tax, what is the total cost of the doll

Keith_Richards [23]

Find the total price

original price × sales tax

33 × 0.04 = 1.32

Add original price & sales tax

33 + 1.32 = 34.32

Hisako will pay $34.32 for her doll.

4 0

3 years ago