All categories

3 years ago

Dave makes 12 groups of 10 rocks and has none left over. How many rocks does Dave have?

Mathematics

2 answers:

Butoxors [25]3 years ago

7 0

120, because you would multiply 10 times 12 which is 120 The pic shows it

zhannawk [14.2K]3 years ago

5 0

120

because 12X10 is 120 and he has 12 groups of 10

You might be interested in

For question 6 what is that value of x? For question 7 find m

forsale [732]

(6) Given that in ΔPQR, m∠P = (x+14)°, m∠Q = (6x-12)° and m∠R = (3x+8)°

We need to determine the value of x.

Value of x:

By triangle sum property, we have;

$\angle P+\angle Q+\angle R=180^{\circ}$

Substituting the values, we get;

$x+14+6x-12+3x+8=180$

$10x+10=180$

$10x=170$

$x=17$

Thus, the value of x is 17

(7) Given that ΔGHI, m∠G = (4x+13)°, m∠H = (8x-52)° and m∠I = (2x+4)°

We need to determine the measure of ∠G

Value of x:

By triangle sum property, we have;

$\angle G+\angle H +\angle I=180$

Substituting the values, we get;

$4x+13+8x-5+2x+4=180$

$14x+12=180$

$14x=168$

$x=12$

Thus, the value of x is 12.

The measure of ∠G:

Substituting x = 12 in m∠G = (4x+13)°, we get;

$m\angle G=(4(12)+13)^{\circ}$

$m\angle G=(48+13)^{\circ}$

$m\angle G=61^{\circ}$

Thus, the measure of angle G is 61°

3 0

3 years ago

Which equation represents a parabola that has a minimum value at y=4

Nikolay [14]

43 yeah but it’s equal to x

5 0

3 years ago

Would you be able to help me with this question I don't really understand

il63 [147K]

Okay, here we have this:

Considering the provided information, we are going to identify wich equation applies, so we obtain the following:

$x+19=2x$

Where x represents the uknown number. Then finally we obtain that the correct equation is the third one.

Now, let's find the missing number solving the equation:

$\begin{gathered} x+19=2x \\ 19=2x-x \\ 19=x \end{gathered}$

Finally we obtain that the number is equal to 19.

6 0

1 year ago

Jenna saves $2,500 per year in an account that earns 10% interest per year, compounded annually. Jenna will have saved in 30 yea

Vsevolod [243]

$~~~~~~~~~~~~\textit{Future Value of an ordinary annuity}\\ ~~~~~~~~~~~~(\textit{payments at the end of the period}) \\\\ A=pymnt\left[ \cfrac{\left( 1+\frac{r}{n} \right)^{nt}-1}{\frac{r}{n}} \right]$

$\begin{cases} A= \begin{array}{llll} \textit{accumulated amount}\\ \end{array}\\ pymnt=\textit{periodic payments}\dotfill &2500\\ r=rate\to 10\%\to \frac{10}{100}\dotfill &0.1\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{annually, thus once} \end{array}\dotfill &1\\ t=years\dotfill &30 \end{cases}$

$A=2500\left[ \cfrac{\left( 1+\frac{0.1}{1} \right)^{1\cdot 30}-1}{\frac{0.1}{1}} \right]\implies A=2500\left[ \cfrac{(1.01)^{30}-1}{0.1} \right] \\\\[-0.35em] ~\dotfill\\\\ ~\hfill A\approx 411235.06~\hfill$

4 0

2 years ago

a cake divided into 10 equal slices.kim ate 3/5 of 1/2 of cake. what part of the whole cake did kim ate?

joja [24]

Answer:

3/10 of the whole cake

Step-by-step explanation:

When you divide a cake in halve you get 5 pieces on each side, if Kim ate 3/5 of 1/2 of the cake, then she ate 3 pieces, so she ate 3/10 of the cake, and other way to figure this out is multiplying the two fractions, 3/5 x 1/2 = 3/10

8 0

3 years ago