Find the missing values for multiplication equation 7/8

Mathematics

1 answer:

Elza [17]3 years ago

5 0

Simple (Cross multiplication )

7 x
_ _ = 700/8 = 87.5 (100-87.5 = 12.5 is the missing value.

8 100

You might be interested in

The angles below are supplementary. What is the value of x?

AVprozaik [17]

Answer:

the angle of x measures 16.6

5 0

3 years ago

So I really don't understand what I'm doing....I would be glad if you helped

SSSSS [86.1K]

We are supposed to assume FC and AD is straight line
let's find all the angles

you already see the right angle is 90 degrees, you got that right
striaght line is 180 degrees

90+46+EF=180
136+EF=180
minus 136 both sides
EF=44
now we got another straight line
you did get that A F=46 because it is oposite

notice: AB=BC because same angle designition
so now we use
180+46+2AB=360
2AB=134
divide 2
AB=67=BC
AC=134 degrees
CAE=134+46+44=224
ABD=180 since straight line

a. 90
b. 224
c.134
d. 180

8 0

3 years ago

What are the exact solutions of x2 - 5x - 1 = 0?.

borishaifa [10]

$x^2-5x-1=0\\\\a=1;\ b=-5;\ c=-1\\\Delta=b^2-4ac\\\\\Delta=(-5)^2-4\cdot1\cdot(-1)=25+4=29 \ \textgreater \ 0\\\\therefore\\x_1=\dfrac{-b-\sqrt\Delta}{2a}\ and\ \dfrac{-b+\sqrt\Delta}{2a}\\\\x_1=\dfrac{5-\sqrt{29}}{2\cdot1}=\boxed{\dfrac{5-\sqrt{29}}{2}}\\\\x_2=\dfrac{5+\sqrt{29}}{2\cdot1}=\boxed{\dfrac{5+\sqrt{29}}{2}}$

8 0

3 years ago

Read 2 more answers

Your parents will retire in 20 years. They currently have $300,000 saved, and they think they will need $1,450,000 at retirement

Tanya [424]

N=20 periods (years)
present value, P = 300,000
future value, F= 1450000
i=annual interest rate

$F=P(1+i)^n$
$1450000=300000(1+i)^{20}$
$(1+i)^{20}=1450000/300000$
$(1+i)^{20}=29/6$
$(1+i)=(29/6)^{1/20}$
$i=(29/6)^{1/20}-1$
$i=(29/6)^{1/20}-1$
$=1.081963-1$
$=0.081963$
$=8.1963%$

Answer: they need to earn 8.1963% or more to achieve their goal.

6 0

3 years ago

Two straight lengths of wire are placed on the ground, forming vertical angles. If the measure

nikdorinn [45]

Answer: 72°, 108°, 108°

Step-by-step explanation:

Vertical angles are congruent (equal) so if one angle is 72° then its vertical angle is also 72°.

A vertical angle and its adjacent angle form a 180° angle, so the other two angles are each 180° - 72° = 108°

see image below

8 0

3 years ago